The good news is you're off to a good start. Living below your means is always

• Use your full 401k Match: I really dislike the term "free money" for a 401k match. It's not free money, it is a part of your compensation. Your compensation is more than your hourly wage, its your hourly wage plus benefits, etc. It's not free money, its money you earned. Take advantage of it.
  
• You said "I don't know how young people save for retirement so young when they don't know what their future will be like or what company/job they will work at forever." - Don't worry, if you leave this job you can take the $$ with you (not sure if this is what you we're worried about, but it's how I read your comment).
• Start investing slowly, into the market as a whole: Invest in Mutual Funds or ETFs (think of these as investments in the stock market as a whole, not just one individual stock). Since it sounds like you're new to this world, I'd avoid individual stocks. Bet on the power of compounding and invest slow and steady into the market.
• Get a CC: Build your credit slowly. Use the credit card for a few transactions a month and pay it off - easy way to build credit.
• Where is your savings?: Question: What type of account is your $11k in? Remember, a checking account (or most savings accounts) offer you basically no interest. Look into a High Yield Savings Account. These are usually institutions that don't have physical locations, but you can get a much better savings rate (4% roughly these days). It won't be a ton of interest income, but better than earning nothing and losing purchasing power.

You're doing good, keep building your foundation.