yep. it's not really easy. it takes time and effort for a beginner to learn all the tools of the trade. but if you're passionate and creative, you'll be able to come up with good strategies and eventually earn a lot in the soonest time possible.
I would recommend you go down this route to supplement your income initially. Over time you might find that you are earning enough to make a full time living but as the others have said it would take time, effort and expertise to get there.