OK, I played the start to 1600BC several times. I think that expansion-wise you are doing fine, I was not able to top that significantly.
Your game at 1600BC: 5 towns, 11 pop, 1 settler, 2 workers, 7 warriors, 2 curraghs.
You have BW and WC and are 17 turns form Writing, 33g cash.
Salamanca:
My game at 1600BC: 5 towns, 11 pop, 1 settler, 5 workers, 6 warriors, 1 curragh.
I researched Writing at minimum, traded that for BW and WC, I am 22 turns from CoL, 227g cash. Salamanca:
In this game I went for granary first in Salamanca, build orders were warrior-worker-warrior-granary. Second worker as second build because there is a fair amount of work to do to get the 4-turner up. I chopped the forest E of Salamanca to speed up the granary build, but then I had to mine a mountain in order to have an extra 2 shield tile to make the 4-turn settler factory work at size 5-7.
In other attempts I let Salamanca build a settler first before going for the granary - this is what I normally do. In that case the results I got were very similar to yours. In the attempt with granary first I think the tradeof was more curraghs early (your game) - more workers early (my game).
Main difference between your and my game are workers (2/5) and tech/cash. At emperor and higher, most of the times it is a waste of time to research a tech if that can be traded for. So a normal strategy is here to do a min run on writing, and buld up cash to later used for a max run on CoL+Phil.
Overall game perspective is fairly grim I think, not undoable but it's going to be a long haul. The countryside could be better. The Salamanca area is fine, but expanding beyond what you have now is going to claim spots that will be hard to make productive. You have no luxes (main reason why I dislike archipelago maps). You are on one island with the Dutch. Their 3 movement curraghs are likely going to get contacts before you do, reducing your trade opportunities. By the time you are ready for war they will have MDIs, and Swiss mercs with a 4 defense. You are ging to need a lot of catapults/trebs to kill these. And roads trough the jungle for the trebs. Also, some mercs walking around in your mountain rich core are going to be a real pain.
You are absolutely going to need iron, and trade opportunities.