+1....You will be glad you did. I had to switch arms/hands/grips years ago lol , a little frustrating at first but 2 days on the water switching back and forth and it's starts getting easier and easier pretty soon it will be a breeze..To start though use the heavy lures on the weak arm they are easier to cast...,
Heck.. I use a very small bait caster reel when deep water or dock jigging for crappie. I learned to reel it backwards so I could have a really good drag system that don't twist my line all up when the drag slips of course I'm right handed but the reason I reel it backwards is so I don't have to switch hands to reel in a fish and I can hold the rod in my right hand..
I just let the reel hang downward under the rod for balance and so I don't have to grip it tite it's much easier instead of trying to keep it on top while fishing..
I have also had to add pieces of padding and rod wrap over the handles because after a while my hands don't want to close up around the grip at all.
Teach yourself to cast with the other arm, if you don't use it you won't abuse it.