It looks really nice so far! Just please don't make it all one flat place. Make hills, mountains, waterfalls, anything to make it interesting. Also make it so the roads make sense.
I know people like flat lots...but that is no reason to make the world itself flat as a board.
My personal opinion is to not make it too large either.
Good luck with your world - you have a beautiful start - please don't give up. Caw can be very, very frustrating.
ps. I wouldn't put any benches or picnic table in the world unless it's on a lot. Sims will drive/walk for hours to get to that bench to eat an ice cream or read a book.