I got my first banana last year and grow in a container. I have a dwarf namwah. I had a couple learning mistake last year, but it put up with beginner abuse and is still alive and well today.
A couple things, I was stubborn last year and put it in a huge pot so that I wouldn't have to repot it, Now I mildly regret it. I didnt drill enough holes at first and had to add more for better drainage. I also just put it on one of those little mover dollys to get it in and out of the garage for winter. Like the one at this website
https://www.homedepot.com/p/Milwauke...3700/100057209
It survived just fine in the garage in its pot for like 4 months plus with almost no attention. It has 4 or 5 new leaves, this year so far.
So now I just need to try adding a couple more banana varieties to my patio. I've been a little disappointed that my dwarf namwah hasn't pupped yet.