With 10$ investment you may have a chance to learn how the things go. From those 10$ you'll spend most on fees, especially withdraw fees, if you don't know what to do.
The chance is big you'll invest in a coin without future.

What coin to invest in? None. If you have to ask what to invest in, then better don't. Better do your own research and try to find the project(s) that worth your attention and your money.
Never invest based on what others tell you over the internet. You don't know if they advertise a coin (or a product!) to help you or for their own benefit. Never trust anyone (not even me!)