masturbating. crochet is mostly one hand, your non-dominant hand just guides the yarn. sewing by machine can be done mostly with one hand. i think you are too messed up to be asking questions with vague parameters.
The Arm wrestling thing is legit, i can beat many people. The reason I am asking is i have a disability called Cerebral Palsy, and it makes my right hand mostly useless and thats supposed to be my dominant hand. I have no friends and havent found anything to do in my spare time kinda depressed, it seems like the only thing i am good at is drinking rum in the dark and lately I felt Im too young for that.
Write jokes and you only need one hand to hold a mic. https://www.youtube.com/watch?v=qxOIbQsm3F0"]YouTube - Dave Chappelle in San Francisco Part 1‏
you have to teach your other hand to not be stupid. my mom got nerve damage in her right (dominant) elbow. she had to learn to write with her left legibly. the disadvantage to learning something like crochet left handed is you have to interpret the images (mostly drawn for righties) seek out left handed instructions, or use a mirror for the diagrams, which makes them tough to read. so what you are seeking is things that your right hand doesnt have to work perfectly to do, but that are easy enough for your left hand to accomplish. bake bread. kneading is work, but its not hard. the result is edible. garden, you can pluck weeds with one hand. you have to tell us where your interests lie.
@ Mother's Love I had to learn to write with my non dominant hand too. I Do tend a garden but its all weeds ha ha, i do have a green thumb, your other suggestions are good but sound kinda girly to me. I was looking at some hobby or talent to attract the ladies.
These are both fantastic suggestions. Better yet, become a great ventriloquist train entertainer with one hand.