To cast on sts at the beg of the row, use a knitted CO. The sleeves will make a T shape out from the body, but done gradually (2 at each side, then 3 at each side, etc) they form a curve. If you think of adding them at the beg of the rows it might help.
It's easier than you think, just try it out. CO 2 sts at the beg of the next row, knit across them and the old sts to the end of the row. CO 2 st at the beg of the next row, knit across. Do this another 4 times, then CO 3 sts at the beg of the next 6 rows. Then you inc only 1 st on each end every inch or inch and a half a couple more times.