Our 6 ‘Best Buys Now’ Shares Click here to claim your copy now — and we’ll tell you the name of this Top US Share… free of charge! Simply click below to discover how you can take advantage of this. Image source: Getty Images When you start investing in a Stocks and Shares ISA, it can feel like not much is happening in terms of growing your wealth. It takes a few years for compound gains to really start working their magic.Look at a chart of your projected net worth and by year five, not that much is happening. By year 10, the line really starts to bend upwards. By year 15, things are hotting up. And by year 20 if you stay invested? That’s when your portfolio really starts to rocket.5G is here – and shares of this ‘sleeping giant’ could be a great way for you to potentially profit!According to one leading industry firm, the 5G boom could create a global industry worth US$12.3 TRILLION out of thin air…And if you click here we’ll show you something that could be key to unlocking 5G’s full potential…I’m 38 now, so if I’m lucky, I’ll be hanging up my laptop and retiring at some time around 2050. If I’m unlucky, and UK government debt goes the way of Greece, it could be a lot longer.Stocks and Shares ISA makes senseIn any event, I’m sticking to a plan of modest growth at the lowest possible risk. I won’t have grafted my entire life to see all my hard work go up in smoke on a series of daft bets.When you’re desperate to get rich quick, that tends to be the point at which you lose the most. You start taking crazy risks, investing your entire net worth in a ‘sure thing’, buying terrifyingly volatile trendy stocks, or shares in unprofitable mining companies.My best shot at achieving a £1m Stocks and Shares ISA is to keep hold of my best FTSE 100 shares, like Scottish Mortgage Investment Trust. I’ll likely hold my favourite FTSE 250 long-term growth stocks, like Games Workshop, too. I may add a few government bonds and maybe some high-profit AIM stocks, like Team17, for a little bit of excitement.By taking the long view and gently compounding wealth over time, I think can still invest my way to a million quid. It’s not so rich I can light my cigars with tenners, but it’s a healthy chunk of change and a reasonable goal.How to get thereSay for example I open a Stocks and Shares ISA tomorrow. If I’m sensible, I’ll have six months’ worth of my salary in a savings account for emergencies. But otherwise, my investing journey starts with zero pounds.I’m keen to get started, so I’m going to add the maximum amount allowed to my Stocks and Shares ISA every month. The limit as of May 2020 is £20,000 a year. That’s £1,666.67 each month. Or about £416 a week. If I stop spending so much on beer and late-night Amazon purchases, I can make it work.At a 10% annual return on my investment it will only take 21 years to reach the magic £1m figure.If I had placed all this money in a Cash ISA instead, it would take — at current rates of 1.4% interest — 40 years of constant saving to reach the magic seven-figure sum.Most investors would be more than happy with 10% consistent annual return over two decades. But say I don’t manage it. Let’s say instead that I get a more conservative 6% annual return. It would take 26 years. That’s still a reasonably long time. But I’ll still be growing my wealth much faster than the four decades of grind with a Cash ISA. I’m sure you’ll agree that’s quite the statement from Motley Fool Co-Founder Tom Gardner.But since our US analyst team first recommended shares in this unique tech stock back in 2016, the value has soared.What’s more, we firmly believe there’s still plenty of upside in its future. In fact, even throughout the current coronavirus crisis, its performance has been beating Wall St expectations.And right now, we’re giving you a chance to discover exactly what has got our analysts all fired up about this niche industry phenomenon, in our FREE special report, A Top US Share From The Motley Fool. I would like to receive emails from you about product information and offers from The Fool and its business partners. Each of these emails will provide a link to unsubscribe from future emails. More information about how The Fool collects, stores, and handles personal data is available in its Privacy Statement. See all posts by Tom Rodgers Here’s how I plan to retire with a £1m Stocks and Shares ISA Renowned stock-picker Mark Rogers and his analyst team at The Motley Fool UK have named 6 shares that they believe UK investors should consider buying NOW.So if you’re looking for more stock ideas to try and best position your portfolio today, then it might be a good day for you. Because we’re offering a full 33% off your first year of membership to our flagship share-tipping service, backed by our ‘no quibbles’ 30-day subscription fee refund guarantee. “This Stock Could Be Like Buying Amazon in 1997” Enter Your Email Address Tom Rodgers | Wednesday, 27th May, 2020 Tom Rodgers owns shares in Scottish Mortgage Investment Trust, Games Workshop and Team17. The Motley Fool UK has no position in any of the shares mentioned. Views expressed on the companies mentioned in this article are those of the writer and therefore may differ from the official recommendations we make in our subscription services such as Share Advisor, Hidden Winners and Pro. Here at The Motley Fool we believe that considering a diverse range of insights makes us better investors.