This is kind of a weird week for Destiny, post 1.xx and just starting 2.00. There's things in the game that aren't active yet (earning Legendary Marks, Patrols working as intended, etc).
This week I would focus on trying to get your character to lvl 34 Any engrams you get you are safe to decrypt, they won't turn into Taken King gear. Don't finish the class specific quests, they give an emblem as a reward that is bugged and you won't get.
That's really it, check out the new crucible modes, get used to the areas again, see if you can join some raids since you may not have done them yet, don't get too crazy, that's what next week will be for.
Head over to the community thread if you have more specific questions, there's a lot of very helpful people over there.
Sounds like a good start, thanks!