I think betting your hand here is perfectly ok , i'm not sure it needs to be so big though , i think you could make it half pot 90 cents , hes going to bluff catch better hands like TT-KK and some weaker Ax and better 8x on the turn.

So your really only betting to fold out his equity share and get some thin value vs a stubborn pp like 66 along with some draws he will peel. Your in position so its really easy to take your showdown on the river.

Call otf is fine turn is okkkkkk. Like checking is fine OFC, but we block 99 A9 and get like kj to fold. Can go smaller tho as Chris says. Think what we want to fold and what size achieves that, $1.1 bet all but Ax go fold so exploit that

Thanks for the betsize-tips. I totally agree and will go smaller next time.