Twenty years old and your first start up didn’t go as planned. Now that’s the first thing to learn about being an entrepreneur, it won't work easily and the first or second time. Often things come in threes and three times is lucky, but that’s no true gauge.
You have to remember that many start ups have lots of money when they start that can come from many places: Venture Capitalists, Savings, Family, Friends a remortgage or loan, many people secure finances have a great idea and can run for a year, what they do in that year could keep them running or it might not. There are always so many things to learn.
Money is an important thing, but it should never be spent without real consideration. The best ideas don't require money in the first place, as I’m sure you remember from the Social Network, coding didn’t cost him anything just time. Investment comes later, once you get the people buying into your website, product or service.
I personally have worked on freelance, contract and full time roles. I have worked in Start ups, Corporations, International Business, Agencies and with many other types of businesses and individuals. I did most of that in the last six years, the experience I have gained from seeing others work, their processes and meeting so many people has helped me enormously. It doesn’t mean it’s been an easy journey, but the things I have learnt were unexpected and always are.
I really don't think start ups are the best environment to work within, it’s not stable and its constantly changing. People do not perform at their best when they are always doing new things, you see the best people have honed their skills and have been doing it for many years. If a start up is full of brilliant talent, then great, but often it’s hard to attract the best people to a risky new venture.
Remember, you are where you are now, you will always want to be doing your own thing, so maybe use your time and money to setup something that you can continue working on while working for someone else in your free time. You will need that personal ownership of something, especially when spending a lot of your time working for someone else.
Also remember, no matter who you are and what you do, you will always have to answer to someone. Someone is paying you, governments dictate how you do things, even if you have staff, you will need to answer to them and keep them focused.
So keep ya chin up, realise everything teaches you something and learning will only make you stronger for the future. Now may not be your time, but if you keep trying, you will get there, persistence is key and never give up, on anything, just redirect your efforts ;)
Good luck man!