Im lvl 12, should I keep doing this storyline BS or is there something else I can be doing?

Should I be grinding by myself or is there somewhere to find people same lvl to quest with?

depends what you wanna do

wanna get to max level stupid fast? do karma train in WvW
wanna enjoy the personal story? Find a friend and play together
wanna scout every map and finish every heart and event? put a message up in map chat asking if anyone else wants to party up

This, I am a nub to this tho any tips?

What's the karma train? Just following the zerg around?

make sure your character has a lot of area of effect attacks so you can claim EXP and loot.

go to World vs World and ask where the karma train is. Find the train, and follow them while they complete objectives and kill enemies

Ask questions if you get lost and people should help you out.

Could also PvP once you hit mid-20s, rewards a lot of levelup tomes...
Got myself a level 80 rev lined up already

what ppl told me is that u cant use level up scrolls at the start of the expansion to level up a revenant Qq i know its annoying that they had 1 good use and now they are useless again

edge of the mists until level 66, bring aoe attacks and follow the commander

at 66, level 2 crafting professions from 0-400, like cooking and jewelcrafting.

even so it wont be like that forever.
Just wait a week or month and there ya go.

Where is this information?
I'd like to know for sure.