1) I would suggest a standard Wheel-Pottery-Writing here. As that's the best approach for most games, really. Beelining Alpha and delaying worker techs can make sense... but those cases are really rare. Here you have great happy cap (silver+gold+ivory ... need roads for connection of course, hence wheel needed. Sailing won't help you. Also a great health cap and you are expansive -> cheap granaries. Not to mention financial cottages (although it's really about the granaries, mainly). Basically you can grow all cities close to size 10 in the near future. No way would I delay that any more than necessary just to save a few beakers by tech trading.
Useful rule of thumb: If there is no gold/gems available in your capital, basically forget about that Alpha beeline. Because crucial tech are being delayed for too long, more often than not. Here you had a rather low commerce start and delaying Pottery until 1000 BC+ is not advised.
2) Horses/pigs/ivory is a great spot and should be settled next if barb situation allows it (should be fine). The Wheel allows you to add a chariot soon. Switch into Slavery now, grow to size 6 and whip the settler for 3 pop as soon as possible. Worker stays in Mutal and does nothing else than chopping. I mean like 4-5 forests in a row, not stopping for anything. Workers, Settlers, Granary. New worker from Lakamha takes care of the 3rd city. Grow Lakamha to size 3 after that and whip another worker (1 pop). All just suggestions of course
3) Too early to worry about wonders I think. Anything is possible later.
4) I think warriors are fine for now, in about 10T you'll have a chariot if you want.
Most crucially, the best tech path here would have been: Agriculture, Bronze Working, Fishing, (Hunting), Animal Husbandry. I think delaying BW has slowed you down considerably. Would have made for a more explosive start.
Another useful rule of thumb: Never build workboats "normally", always chop them when possible.