I am by no means a great expert, but some of the things I would have done differently:
With Ag and wheel as start techs, and getting hunting from a hut pretty early, I would have gone to AH very quickly. If no horses in my capital's BFC, plunk an early second city near them and get war chariots up. Great for barb defense and for extra exploration - very much needed in your case with your given warrior getting killed early.
If horses are nearby, I likely would have skipped archery at that point and gone to BW (for whipping and chopping mostly) and then perhaps some religious techs looking at possibly founding one, building a wonder within that group (Oracle), and opening up some different civics.
With Boudica close, I would have been tempted to chariot rush to at least hamstring her if I could.
Looks like in Thebes you went worker, settler, worker, worker. Good to have the workers, but I like to intersperse some additional units in there to give the city time to grow. Since you went BW so early, might as well take advantage of slavery more and perhaps chopping (not sure how much you did).
As it stands, you are not in a horrible place even with the DoW by Boudica. Did not look at the save, but you need not fear an early war if you are able to do some damage and hopefully take some land. Yes, it hurts the economy in the short term, but your expansion and the curtailing of your nearest (currently only) neighbor is good in the long term. I'd check to see if she has iron units, though, as that could be a pain and you'd need to locate the source and pillage it forthwith. You still should be able to defend quite well with war chariots and axemen (and archers in the cities).