Quote from @Cesar Rivera:
College is almost always a waste of time, particularly for an investor. You can learn everything you need to know for free on BiggerPockets. Buy some books and you'll accelerate that learning. Get a coach or mentor and it will accelerate even more. An above-average person can self-study and know what they need within 3-6 months. You can be financially independent and wealthy in 10 years.
Start by developing a goal. What do you hope to achieve? If you don't know where you're going, we can't help you get there.
Reverse engineer. If your goal is $10,000 a month for the rest of your life, how many houses or apartments or storage units will it take to get there? If you decide it will take 10 fully-paid for houses and you want to have them within 10 years, what will it take to buy house #1, then house #2, etc. Do the hard work, put it in writing, and follow it. You'll be leaps ahead of most.
Once your plan is developed, make a list of what you need to know (analyzing properties, finding deals, inspections, application screening, etc.) and start educating yourself. How will you get the money to put down on a property? Can you qualify for a loan? Can you partner with someone to accelerate this process? There are many things to learn, but you'll accelerate your learning by putting pencil to paper, making a list, and then knocking things out one at a time.
Here's some generic advice.
1. Start with BiggerPockets Ultimate Beginners Guide (free). It will familiarize you with the basic terminology and benefits. Then you can read a more in-depth book like The Book On Rental Property Investing by Brandon Turner or The Unofficial Guide to Real Estate Investing by Spencer Strauss.
2. Get your finances in order. Get rid of debt, build a budget, and save. The idea that you can build wealth without putting any money into it is a recipe for disaster and the sales pitch of gurus trying to steal your money. A wise investor will not try to get rich quick with shortcuts. If you can't keep control of your personal finances, you are highly unlikely to succeed in real estate investing. Check out my personal favorite, Set For Life by Scott Trench , or The Total Money Makeover by Dave Ramsey.
3. As you read these books, watch the biggerpockets podcasts. This will help clarify and reinforce what you are reading. You can hear real-world examples of how others have built their investment portfolio and (hopefully) learn to avoid their mistakes.
4. Now you need to figure out how to find deals and pay for them. Again, the BiggerPockets store has some books for this or you can learn by watching podcasts, reading blogs, and interacting on the forum. There is a handy search bar in the upper right that makes it easy to find previous discussions, blogs, podcasts, and other resources. Biggerpockets also has a calculator you can use to analyze deals and I highly recommend you start this as soon as possible, even if you are not ready to buy. If you consistently analyze properties, it will be much easier to recognize a good deal when it shows up. Find Brandon's videos on YouTube for the "four square" method of analyzing homes and practice. It doesn't take long to learn how to spot a good deal.
5. Study the market. You can learn to do this on your own or get a rockstar REALTOR to lead the way. I highly recommend a well-qualified REALTOR that works with investors and knows how to best help you.
6. Jump in! Far too many get stuck in the "paralysis by analysis" stage, thinking they just don't know enough to get started. The truth is, you could read 100 books and still not know enough because certain things need to be learned through trial-and-error. You don't need to know everything to get started; you just need a foundation to build on and the rest will come through experience and then refining your education.
You can build a basic understanding of investing in 3-6 months. How long it takes to be financially ready is different for everyone. Once you're ready, create a goal (e.g. "I will buy at least one single-family home, duplex, triplex, or fourplex before the end of 2019") and then do it. Real estate investing is a pretty forgiving world and the average person can still make money even with some pretty big mistakes.