Hey! Good to see you posting again! There are SEVERAL photo contests now, let me just give you a couple starters. The photocontests is run by @juliank, so follow that account. He is on a different time than us, so far that it is a different DAY, so watch for his post announcing a topic each day to get the most out of your photo post from him. For isntance: https://steemit.com/photography/@juliank/happyfridaysteemitshareyourstreetandportraitphotography-201807200000015359
You will see that his Friday post went up 16 hours ago, ideally you want to post your street / portrait photo within 24 hours of his post going up (it makes you eligible to win the contest, which is INCREDIBLY competitive, so if you have a great pic and need a post idea, just post any day.) You will also see the list of each day's photo subject, they are the same every week so you can start planning ahead and trying to get photos for the different topics. After you make your post, it is helpful to click the tag you used and go upvote a few other people in the same contest. If you go support folks who are not "big players" they are very likely to come upvote you back.

OK, the other photo contest I recommend is a weekly one, hosted by @killerwhale. The guy running that account is top shelf, he also runs @thealliance which once you are "in the groove" let me know, and we will get you into that group. He has a different theme each week. You have a MUCH better chance of actually winning one of his contests. I have to run to Ontario this morning, but I will point you toward more photo contests when I get back!