South is on the borderline to open (1H) or not, with 12 count, 5-3-3-2 shape and QJ doubleton. So the bidding coulg go: P-P-P-1H(North) (2D/3D?)-??? After that, it depends on individual's style to bid game (4H) or not.
if you open with 12 why not with good 11? if you open with 11 why not with (good) 10? if you open with 10 why not with (good) 9? if you open with 9 why not with (good) 8? ... ... ;):lol::P:lol::lol::lol::lol::lol::lol::lol: