A mistake people make in these forums is that they think the platform will make a difference. It doesn't. It's how you use the tools. And most don't know how to use the tools effectively.
I'm not going to say you can make a certain amount, that would be silly. But I can tell you that if you use it properly, you can be successful and profitable. I've helped many to be.
First you need to learn how the system works, how to target people you want to sell to. Too many use keywords that are too generic. They get clicks but not good clicks and thus wasting money on clicks that were just out of curiosity or at a different buying cycle (if they were even thinking of buying in the first place). Then you need to know how to attract those clicks. Very few know how to do this effectively. Finally, your landing page needs to convince that visitor that they need what you are selling. Here too many fail. But put all these together and you will be very successful and profitable.