Comments pay in author rewards, not curation rewards. Theyre voted on and paid just like OPs. To be honest, i have done much better in comments than I have in OPs. Of the 1200 i made in author rewards this week, like 100 has been from original posts.

To be perfectly honest with your level of SP, you don't have to worry about curation rewards. You're not going to get a signficant amount no matter when or how much you vote. What youre saying about voting is a little off, but tbh i wouldnt worry about it.

I usually do tend to upvote my own comments for increased visibility (and as protection against spam downvoters). But with your level of steem power, pretty much who cares. Really nothing you do with voting is even going to be moderately financially signficant until you have 10K SP or so.