Fold pre. But for 2.5bb it's fine to open I guess.

I think I like 3bet/gii flop here as most of turn / river cars will be scare cards. River just 3bet ship with 2nd nutz

Opening K9s UTG is a little wide IMO but it's close, if it's a losing play it shouldn't ever be that bad.

On the flop then I would be looking to reraise GII here with so much equity. There are no hands that you are crushed against and villain can sometimes show up with worse 9x where you have them drawing close to dead.

As played I like the turn check since if you bet and get raised again you're in a very awkward spot.

Fiver I am never considering not shipping in the moniez here. If you're against the nuts then so be it, coolers happen. But you're going to be missing oodles of value from many worse flushes/other random hands he can show up with here.

I'm not gonna argue with preflop since this is a std raise for me, though you might want to be tighter at 2nl.

Getting more money in on the flop will almost never be bad since this hand as such high equity against basically everything. Plus, it has a set blocker so this range should be slightly more weighted to bluffs.

I'd ship river as well. If villain is really tight then it's probably close since he can of course have some nut flushes but there are a few Q high J high flushes he can have too. The way he played it makes me think villain isn't that great so I'd ship.

Pre flop is usually a fold for me, but it's great that you're adjusting to a weak player in the blinds so it's probably fine.

As played, the whole point of opening wider was to increase your value against a bad player. Once you hit the second nuts it's a crime not to get it in when he has tons of worse hands which aren't folding.