Weapons vender on Wandering Isle

I started a Pandarian Shaman. I chose to start in Pandaria, and I’m on the Wandering Isle.
I started with an ax and shield, and when I found a 1H mace, I changed weapons because the mace is better. I had no problem using my flametongue weapon with my mace, and it showed a buff at the top of the screen.
When I hit level 10, I chose Enhancement talent spec. At level 11, the only spec available is Stormstrike.
Now it requires me to have a 1H weapon, or it doesn’t work. I have been unable to find a weapons vender to buy a second weapon. Also, Flametongue no longer works.
What do I do about a second weapon? (I sold the beginners ax when I upgraded to the mace.)

Youre probably going to have to go ele until you get a second weapon.

Enhance abiltiies require dual wield. Flametongue becomes an offhand imbue with enhance

you could go buy a white weapon off a vendor if there is nothing reasonable on the AH, or you can fly around a little bit killing rare spawns you will probably get a weapon drop from one.

I have been unable to find a way to leave the Wondering Isle, nor have I been able to find an weapons vender or an Auction House.
(I have also read that if you leave the Wondering Isle, you can never return.
I have also read that a player can never leave the Wondering Isle (something about a remix?)
My google searches have left me even more confused, and it seems like all my google searches bring up stuff from 2022 and older, and the information no longer applies or works for The War Within.
I do appreciate the responses.

at the end of the quest chain it should send you to the capital city of your faction, check your map and make sure all the tracking is turned on and then go do whatever quest you have left.