Here a few tips for starters since you probably won't get any advice from those who comment under here, here's what I gathered thus far.
It's tough to make money at first so if that's your main cause to be on here grind that into your head straight away, that doesn't mean you shouldn't post content, you should, but enganging with others in the comment sections to grow your following is your best bet. Which categories?

Probably the introduce yourself one and the photography section but you can choose things that you have knowledge about too and then go from there just know that there is a lot of crap on here so plowing through that just to connect with others can be tough. Cheers.