I am on SSDI and I went back to work. They give you a 9 month grace period to make however much you want. If you feel you cant do it you can always quit within those 9 months and still keep your benefits.
They also have this $1000 rule. If you make less than $1000 a month on your benefits you can keep it for up to three years while working. Thats how I understood it.
I have a part time job because I have been on SSDI for close to 5 years and I think the limit is 7 years before they reevalutate your case. Then you have to prove to them why you need to stay on SSDI.
I received all this information from a counselor at the program I am in. If you are on any type of therapy find out some information from the people at your counseling center. Thats how I know all of this.
If you want to go back to work, you should. Get a part time job so you can keep your benefits or volunteer if you want. I just went back to work because I feel I needed purpose too, I was lost and the days were dragging on and on and I was in a state of perpetual boredom so I just had to do something so I understand where you are coming from.
Good luck! Also, you can PM me anytime if you want to talk about it more. I am always here for everyone.