Hi Connor,
Whenever you join a dating app for the first time, you are going to get a lot more attention in likes than you would if you are an old-timer on the app.
In other words, you received the 10 likes after only having joined OkCupid last night because you are new.
I would give it a little more time, at least another couple of weeks, to see just how many more likes you continue to receive and the quality of the likes before getting overly excited and choosing to go premium.