@Josh Bugbee not to reiterate what's been said, I'd add a few points to summarize.
First, forget the "go big or go home", we tend to hear about these ppl who've done a 100 unit syndication their 1st deal, thats extraordinarily uncommon, the reason you hear about that is because its such an anamely, & you're not given the back story of their 10 prior years of high level corporate management, etc. "Easy come easy go" would be more correct, so to build a portfolio that provides you financial independence, I'd say take 5, 7,10 years & build something sustainable that you can get your mind around.
If you're serious at all, BUDGETING COMES FIRST. Unless you're a very high earner, I'd aim to save not 20%, but 50-75% of your income to dedicate towards RE. Its easy to picture the glory of a huge passive income, but grinding though months of frugality will give you a small window into the sacrifices required to make RE work.
If you can dedicate yourself to the grind per above, you can scale relatively quickly. I'd start with a house hack duplex for 3.5% down - I'd recommend you look at some off market deals sources so you can get an amazing deal that cash flows after you move out, & can cover the mortgage if 2nd unit becomes vacant or tenant stops paying. Then I'd save up for a 20% DP for a 2nd duplex from the 50-75% you're budgeting. There, in your 1st year you'll have 4 units & will be on your way. You can repeat this & use Brandon's "the stack" idea to increase your rate of acquisition year after year. In 5-7 you'll have 20-30 units and be well on your way.
I'd start all this by literally reading EVERYTHING you can. What to read? I'd recommend you start with Brandon's 3 books - rental property investing, investing in real estate with no and low money down, & managing rental properties. If you internalize those 3, you'll have a strong foundation to get started.
Good luck and have faith in the grind.