hey,
I recently picked up 27 single draw, I found almost no good material about that variance on the internet, so I have a few questions for some better players. If these are dumb questions I apologize, I am a semi-fish at this game.
I mostly don't know too much about hand ranges from different positions:
1) Assuming a 6-max table, what range should I be opening UTG? All medium-strength J-highs are a must raise (like JT752)? What about Q-highs (strong or weak, what kind of difference is there between QT942 and Q7532)?
2) If I am in position against one opponent drawing one card, should I value bet any J-high? What about Q-highs? Should I draw a card with weak J-highs (like JT975)?
3) What if opponent draws 2 cards?
4) What should I do with J-highs out of position? Draw one, or check-call?
These are a lot of questions, but I'd appreciate some general rules of thumb for some standard situations, and what spots are EV+ in general.
cheers

1) JT752 is close. Id open it 6-handed because I like the aggressive approach. Folding cant be all bad(maybe best). Q is normally not a pat unless breaking it doesnt improve your equity enough. I suggest folding QJxyz and breaking most Qs that draw to decent Ts. QT942 is quite hard. I think I break that. Q7532 is an autobreak.
2)Most Js are check backs IMO. JT975 is a pat.
3)Vs draw 2 you should always pat Qwxyz and valuebet decent Js like J8xyz.
4)Js are hard out of pos. If you can break it with for instance J9862 then I would.

Some general initial thoughts.

Generally agree with first responder on all points.
Keep in mind it's a no limit game. If you are caught value betting thinly with jacks / opening bad pat jacks oop than observant opponents will punish. It's like all big bet games, get a feel of the ranges your opponents play and how they deal with yours. Adjust first.
In regards to bad pat jacks, breaking them doesn't improve them much but smooth jacks oop should often be broken because if you pat them, they're hard to accurately value bet/check give up vs one card draws.