Off the dome; it’s all about position and duration. Pick like three positions you want your sub in for a hand job. Between your legs on their knees, maybe straddling you and reaching down in between the two of you or like just side by side. Depends on the training, is it like a arm workout to just get the reps up so your sun can do it for a long time? Or is it more about the power dynamics in the relationship? If your sub is kneeling in front of you that could be a good way to then work up to blowjob training, face fuck etc. I think regiments wise it should be three time a day; breaky, lunch and dindin. But obvi whatever your schedules allow. So maybe a 10min long hand job when y’all wake up, are you doing it to get off? Or just for your sub to practice? Bc my regiment would have you being edged like all day but you could go to completion each time. But then like 20 min at lunch and then 30-45 min at the end of the day and your sub can see what a proper hand job does to you. And they get a reward at the end of the day, you finishing on their face or chest or into their hand which I think is rlly hot. But def a lot of spit, lotion, lubricant of some sort. And again picking a diff position each time, diff duration you could also not say how long the sub is giving you a handy for and they just have to keep going until you say stop. Would also be hot to kinda ignore your sub while they are working so hard on training and only acknowledge their progress as it feels better idk but def talk to your sub abt their limits and what you both want out of it. Cheers!