About sharing food, the point is that if one city is not growing another can pick up the resource to get the food. Plains-cows are only 3
, that is a bit low for useful sharing, thus I would rarely center a city on sharing such a tile. Basically the only time kyoto would not be working it is after whipping down to two population. City 3 and 4 are better early cities due to having a strong food resource in the first ring and actually claiming land. City 2 can be backfilled whenever you want and while being a good city, it is nothing to get excited about.
Maybe your city 2 could also be placed 1W, losing the horses in the first ring is no big thing as you want a border pop ASAP for the fish, and allowing to work the silk, as well as more overlap with the capital for growing cottages. I would grow the city on the cow, or if it is worked by the capital, a grassland farm, whip a monument at size two and go from there. Also the horse could not be worked right away, as you have to improve it first, reducing its impact.
With the current scouting information I would settle 3-4-2, possibly delaying 2 to claim even more land, if the land is very good.
About tech choices, due to having few forests BW can be delayed a bit, after pottery seems reasonable. The reasoning behind this is that whipping really profits from having granaries set up and granaries really help with growth in general. Having earlier granaries allows for earlier heavy whipping, which is good. Pottery will also give workers something useful to do besides improving resources and roading, namely building cottages. In this case I think both paths (Pottery->BW or BW->Pottery) are possible.
Going for early alphabet to trade for BW will definietely get you later BW than teching it yourself, loosing your biggest source of production. I think it is at best a dubious move.