The best to do with 50$ is to take it and leave it a side.
After that start searching in the forum or in Google how to trade how to invest smart.
Best choice is to invest in tutorials this is the best thing you can do. Find a tutorial that can get you some knowledge. Then you will have the odds on your side a little bit better on what to do with money. Search money management also it is very good to know how to manage your capital / budget.