Any suggestions what dapps I should look at first?

If you’re a gamer, you’ll want to check out Splinterlands (formerly SteemMonsters). Steemit.com is actually a dapp, but many here prefer the SteamPeak front end. eSteem is a dapp for mobile devices, Actifit for fitness, and there are several hundred altogether. Maybe a dozen or so major dapps with a bunch more for niches.

By the way, you don’t need to do all of your upvotes at 100%. You’ve got a slider bar where you can specify 17% or whatever. Your voting strength will dissipate if you do too many 100% upvotes. But your voting power regenerates by 20% per day.