[quote=@January]
Use the Bungie forums and either hop in to someone's LFG or make your own for raids and whatnot (though I think most things now have an automatic matchmaking system barring 6-man raids). I would volunteer to help you, but I lost interest before the Trials of Osiris came out (so, basically, right before the House of Wolves expansion) and I'm now hideously underleveled compared to the current light levels cap (40).

I can recommend a few people I know who still play that game religiously and are willing to run new players through raids for gear if you want.
[/quote]

Light works differently now. If you jumped into Taken King, you'd be (I'm guessing?) level 32, and playing the story quests would bring you up to 40. Light is simpler now and makes more sense -- it's just the average value of all your gear. You can get up to 290 in about a week (or less if you go hard), and that's all you need to start raiding again. The new max light value is 310, but I don't think anyone's actually there yet.