I’m left-handed but I use my right hand for mousing and cutting. That’s never been a problem for me.
On the other hand, (ha) I actually only use my left hand to write and to eat. For nearly everything else I use my right.
EDIT: apparently I discovered this morning I also use my left hand to shave.
I do things very similar! Write, eat, pull open doors and drawers with my left. However I grab and carry, use scissors, wipe, use a mouse, and brush my teeth with my right. Anything else is literally either hand.
This is actually called mixed-handed and I find it to be so much more useful rather than restricting myself to one handed living - I can scroll using a mouse wheel with my right as I take handwritten notes with my left. Once you start to see your ability as not being restricted by your hand choice I think you may find this fact about yourself to be super cool and unique as well as highly useful!