Rows in section 326 are labeled 1 at the front and 24 at the back. Seats in the front rows will have a far superior view of the field, while some rows at the back are under cover and will be in the shade first.
Upper Level seats are pushed back pretty far from the field, so make sure to choose seats in a low row or in sections 324-328 for a home plate view. Don't be fooled by the difference between box seats and reserved seats. Box seats offer no additional amenities; they are just in lower number rows. Sit on the first base side for the earliest sun.