have enough, a lot, etc. on your plate
have a lot on (one's) plate
To have a lot to do. I just have a lot on my plate right now while I'm finishing up my degree and doing this huge project for work.
have enough on (one's) plate
To be sufficiently busy or preoccupied with work, problems, or difficulties as to be unable or unwilling to cope with anything more. I really wish I could help you move this weekend, but I have enough on my plate as it is!