You are going to have to assess the situation at the time. Are you late to the party? you might want to do some dungeons or just suck it up and struggle for awhile.
If you are anywhere near the first wave, you won’t be alone in your leveling greens and maybe a blue here or there. You start getting the PVP blue set early - it doesn’t all come at rank 10. Each rank gives you something.
If you are serious about jumping into PVP early, start farming rep in the BGs when you can. The rep epics fill a lot of gaps that the blue PVP set leaves you.
Get a head start by doing all the pvp you can as you level. Getting rank 3 before you hit 60 is easy.