If everyone who can attacks the goblin on Solidad and kill it she should be free to move without getting attacked. Even if she is attacked as she backs up it would probably be better than standing her ground in the melee fight.
Everyone is within 20' of each other. You are lined up across the width of the gulley. The gulley is only 20' wide - so nobody can be more than 20'. Directly in front of you is a similar line of goblins, one facing each of you. But the answer to the question - yes, within easy range.
I did post the order you are in across the gulley in the game post, but I don't remember it off the top of my head. You can look there to find it if you want to know who is on either side of Soledad.
I will try to get a Post written for Dok later tonight as I will be busy Sunday thru Friday night at Rhema Campmeeting with 3 services per day Monday thru Friday that will occupy most of my attention this week
Do you have the character sheet for Thaoran? I sent it when we first started. It lists all of Thaoran's equipment among other things. You have one potion of healing. You can take a potion as a bonus action. You get movement, attack and one bonus action per turn. So you could attack and take the potion on the same turn if you wish to do so.
By ringing the doorbell on the Vargolg this is a big and dangerous fight.