Megiddo, dat's koo I have an offline sparring partner who swears off online as well so I understand. I am one of those online masochists so that's why I keep playing online. But it does kinda suck when you play serious against good players and realize that even if you win or lose it doesn't really matter, but I only play online to learn playstyles so that's good enough.
Some setups off the top of my head and maybe from watching videos are:
RFF ff+3, SS JFSR
RFF b+2, JFSR
LFF blocked jab or d/f1, JFSR - used as a high crush perhaps?
LFF u/f34 (blocked), JFSR
RFF d/f4~hold f, RFS 4 (blocked...even though this sequence is a good setup for other things in and of itself esp. at walls), JFSR
I think the blockstun moves in general open up to JFSR setups. I also realize some of these can be negated by BDC or quick pokes, but yea this is mostly off the top of my head so not really tested-worthy, but maybe it can give you some ideas. I haven't used Hwoarang long enough to know his ins and outs, but he is a fun character indeed.