These are Bad Answers and instead you just need to read and obey two books and two books only:
If you do this, it will prevent you from being any more screwed than anyone else, regardless of market conditions. You will also not become flamboyantly rich overnight in the way that Crypto speculators do.
If you want to just save/invest passively: https://www.amazon.com/Bogleheads-Guide-Investing-Taylor-Larimore/dp/0470067365
For most people (who really don't spend the time to understand companies), I'm totally in support of what I call the Ronco Rotisserie method of investing: Set it and forget it! Buy some low MER ETFs and forget about them.
If you want to invest more actively, I like Peter Lynch's books, classics like The Intelligent Investor. For ideas, I'll look to Morning Star, Valuline, Credit Suisse, etc.
I don't trust sources that generate revenues off of views and/or clicks (CNBC, blogs, etc.). Most visibly, you see the militantly bear cases for Uber/Lyft here or militantly bull cases (at least until recently) for Tesla, which I think is impacted by sources that are looking to generate buzz. Then you go read something like Aswath's blog, Morning Star, or Credit Suisse which has a much more balanced view on the company when compared to MSM.
What funds do you have available? If you have no Roth option I would definitely only invest up to the match and do a separate Roth IRA.
As for picking funds that consistently beat the market, its a fools errand. Minimize fees and match the market. Here is some reading if you'd like to learn more: https://www.amazon.com/Bogleheads-Guide-Investing-Taylor-Larimore/dp/0470067365
Dave would tell you to invest in high fee retail mutual funds with a load. That is not good advice.
As other's said, you likely want to keep most of the $5000 as an emergency fund. This means you don't want any risk, so a money market or high yield checking yielding between 2-3% would be good. LMCU offers a checking account with 3% interest (with a couple easily met requirements).
I would consider investing $20 and several hours of your time to read a couple books on finance / investing. It's pretty simple for the average person. Boglehead's Guide to Investing is a good one to start with and will teach you about insurance and other topics. I'm sure the wiki here or Boglehead's wiki would be good if you are interested in others.
Investing in yourself at this age is very important, as making yourself more valuable and earning a higher income will likely yield the most return.
If I were to go back, I would have opened a Roth IRA when I was 18 and saved as much of my income as I could (even if it were only $50-100 / month) in total stock market index fund (FSKAX or VTSAX), while keeping a good-sized emergency fund (6 months of expenses). This may not be right for you though - educate yourself before doing this.
> I want to invest but I don't know if I should buy more real estate or what else.
For some basic investment literacy, it would not hurt to read "The Bogleheads' Guide to Investing" (https://www.amazon.com/Bogleheads-Guide-Investing-Taylor-Lar...). I've also heard good things about John Bogle's "Little Book of Common Sense Investing" but haven't read it.
Firstly, if you want to get into investing I would highly recommend reading "The Bogleheads' Guide to Investing". It is geared more towards Vanguard, but the same investing principles apply.
Link to Amazon: https://toptalkedbooks.com/amzn/0470067365
Secondly, don't be afraid to shop around on where to invest. As posted above, Total Stock Market Index's and Target 20XX accounts are a great investment vehicle to use since the company (in this case Schwab) does all the investing into stocks and bonds for you. This is all explained in the book I posted above, as I was in the same boat and had no clue where to begin. Best of luck!
Mutual funds are probably your best bet for getting started. Super simple, instant diversification; just set it (monthly contributions), forget it, and let compound interest work. Check out this book: The Bogleheads' Guide to Investing .
If you'd like to do something more active, there's nothing wrong with that, it's just very hard to beat the market. Most professionals can't even do it consistently.
Your honesty and self-awareness are great first steps in remedying your lack of knowledge. Figuring out your goals and time horizon can actually be the hardest part of investing. It's a necessary prerequisite to actually investing though because, as you can see, your time horizon directly affects the type of investments you should consider.
I would advise plopping the money into a 6- or 9-month CD and spending that time getting yourself up to speed on some investing basics. Better to "lose" 6-9 months of investing time than to invest in a way that could potentially be hugely detrimental, especially when you have such a nice nest egg to preserve (and hopefully grow).
Here are four books and a great website to start you off: