You won’t progress that far in two weeks anyway. But honestly, I wouldn’t stress about it until after you’ve played through the entire thing and then get to the point of choosing a covenant. Because you should learn a decent bit about them by that point. And if you don’t plan on rushing your leveling, then you’ve got a bit of time to decide.
Keep in mind, I absolutely despise this entire system and am pretty pissed that they locked new abilities behind this type of thing. My issue is playstyle vs what fits my character storyline. The abilities for one Covenant may be a lot more fun than the one that fits my character story better. And that, to me, is crap.
But I’m just trying to find ways to deal with it and see how it goes. So that’s why I’m trying to help you with thinking about it from another angle, in hopes it’ll help your stress level.