I don't know when minnowbooster will sell your vote. Minnow booster says that your vote needs to be worth at least $0.06 in order for them to start selling your vote. I've signed up for it, but only 1 autovote has happened, and its the one with the negative payout(how does that even happen). I still love minnowbooster, and think that they are great, but their voteselling isn't for minnows. Everything else is great for minnows though. To gain prominence on steem, I'm not the best buy to ask. There are tons of guides floating around, just search for one. But here's what I say: Be unique and be you. You will grow slowly at first, but you still will grow. It can be tough at first but as time goes on, you will get better. Most importantly, don't give up.