Crafting options-Mesmer, help (new player)
Crafting doesn’t affect PvP and you can PvP the moment you exit the tutorial.
For WvW/dungeons/Fractals of the Mist, if you want to min-max with Ascended tier (i.e. highest tier) gear you will need the following crafts:
Tailoring
Artificier
Huntsman
Weaponsmith
You can technically have 4 crafting disciplines per character with the Additional Crafting Licence item from the Gem Store, which are 800 gems each, or 112 gold as of time of writing. Alternatively, you can make an alt and spend about 60g to level the extra two crafting disciplines from 1-400.
You can have more than two crafts, but only two are active at the same time. Switching active crafts cost a small sum.
You have five character slots so you might consider creating an alt to take two crafts. Personally I have four chars with two crafts each. There is also an item in the gem store that lets you ha e more crafts active per character. It is for convenience so it costs a fair bit.
Don’t worry too much about crafting. You gonna need crafting for your ascended gear, but that’s far down the road. Ascended armor don’t give you much stats and cost a lot so most ppl just use exotic and eventually craft ascended when they accumulated enough material. For exotic, there is better way to get gear than crafting.
You can go into crafting right away if you want, but you could wait until after you are level 80 as well. That’s what I did 2 years ago. I started crafting when my second character was at level 40.