This is just a minefield of YIKES
I’m going to assume you just mean wholesome pleasures, things you can enjoy with nothing but childlike joy.
Video games are a great source of pleasure in my life. I’d recommend Genshin Impact.
I also enjoy writing plays and reading ancient poetry. Currently reading the Aeneid.
Gardening has become an unexpected joy in my life. I recommend learning to take care of a succulent for a while, then gradually increasing to more intense plants.
Okay but seriously I’d just recommend finding a visual stimulus you enjoy and, well, getting to it. You can also use hairbrush handles and the like as makeshift dildos.