New player looking for tips

Hi everyone,

I played classic and retail really casually
and after my subscription ended I want to try wotlk pvp as I read this seems to be the best pvp expansion

Now I have virtually no clue about how to get going and never played arena before

Any suggestions on how to start out?

Same way you'd start anything else, google guides. There's nothing we can tell you that isn't covered in some guide.