Opened it again and you're right, the amount of forest around the capital is kinda shocking. Not sure what I was thinking. I guess sometimes maintenance becomes an issue when I chop out a lot of units and settlers early. But I guess as long as I get Pottery before expanding it should be fine?
It's probably fine to have 3-4 cities before starting to seriously build cottages, depends on map of course. Especially when you start building those in your capital, it can't really focus on settlers and workers anymore (except occasional whip, maybe?) so you want other cities around to either make settlers and workers or share cottages with capital (switch them from city to city so they always grow).
For maintenance before pottery, settle close to cap with trade routes, take advantage of commerce on water tiles especially lakes if you can to boost commerce.