Like for real?

Do ace quest. Farm a good Mindbenders Ambition, and a Snapshot Kill clip tataras if you really want to get into sniping. Also keep your eyes out for a well rolled good bone structure from Banshee. Heavy can be any hammerhead roll or any GL with prox det.

If youre just starting out, you still have a lot of mechanical skill to learn, so dont be too harsh on yourself.

It all takes practice, but giving yourself the best shot at winning is always a good move. I highly reccomend focusing on your hand cannon shot since HCs have been a mainstay in the crucible since its inception. Good HC aim never goes to waste. Fl

For subclasses, I reccomend Spectral Blades, Top and Mid tree Palpatine, Nova Warp, and as a wild card, top tree dawnblade. Titans are okay but they are very gimmicky and what makes them good isnt tied to skill necessarily and because of that theyre in hot waters waiting to be nerfed. (eg Shoulder Charge, Suppressor Nade, OEM)

Remember that map control and heavy control can be worth more than a couple kills, and that trading every death isnt helping your team at all.

Theres a LOT of good vids out there about some of the more hidden tips and tricks (like mtashed's crucible school) but what I said above at least should push you in the right direction.