So I work as a janitor and I've had a lot of financial hardships lately, to the point where I had to ask for more hours. However they wound up giving me a split shift that leaves me no time at all to work on my hobbies. All respect to my employers, but Janitor is something you do until you can do something better... and all my free time goes to game development and learning code. On top of that I have an old physical injury that flares up sometimes and the non stop work has made it more annoying than usual, but for various personal reasons and pride I don't want to make an issue out of that. Mostly I want more free time now that the immediate need for more hours has passed and especially since the hours they gave me are less than ideal to put it mildly. They said they'd replace one of my split shifts with somebody soon but nobody wants to be a janitor and it doesn't look like that'll happen any time soon.
I like these people a lot and can't risk hurting my relationship with them. How do I get more time for myself, tactfully?