I think you should upvote your posts for now until you grow more Steem Power. Self-upvoting posts is perfectly acceptable on Steemit, although self-upvoting your own comments is kind of frowned upon. There are a lot of people who leave meaningless comments all over other peoples blogs just so they can upvote themselves and that is not really cool, but upvoting your own posts is perfectly fine.

As you grow and perhaps create your own community that could change in the future.

Here's a really cool site about Steemit Ettiquette you may find helpful.