Your hunter has mostly Blue and Green logs on HC. That puts you above most of the people you’re playing with, with one notable exception, who must be quite good.
You could doubtless get better if you were playing with people who are more serious about the game, and put more time in.
So if that is what you want, do it!
Find a guild that is working on Mythic. The main thing to keep in mind is that it dosn’t have to be on your current realm. Be prepared to server transfer. Also, be prepared to change faction: it’s just a raw fact that for any competitive play, Horde is more active than Alliance, and you will likely have a better future there. (At least you can keep your appearance :P)
Such a guild will also check your logs, and unless they have openings, you will have to sell yourself to them, because your logs are ok, but not outstanding. So start thinking about that.
Start looking here:
Meanwhile you should also check out Discords and Communities that arrange M+ and HC runs. Get yourself some better logs and upgrades, maybe.
The Fail Train:
Mythic Plus Friends
Scared of Dungeons
I wish you the best with it! Ask more if you need to!