I will advise you to put the earnings aside first and focus mainly on the learning aspect, because you can't start earning from where you don't understand how things work. 
 
And indeed, there are great opportunities here in this forum, but that depends on what you have to offer. If you have a skill that the people are interested in, you can market yourself here. 

To your last question, as a newcomer, you need to remember to keep the forum rules read and understand them, and if there is anything you don't understand, ask questions, and answers will be provided. 
 
Check pinned messages on this same board; you will find those threads helpful.