Re: Leaves browning around the edges
Browning out because a banana gets to little sun is not very likely. Seems to me your banana just needs to toughen up for a while. Every new leave will become stronger and stronger. If possible provide some shade if gets to much sun.
Most bananas are grown inside, simply because they can't be grown outside in the winter. This results in a weaker plant. It's like that with every kind of plant.
Ideally you let them get used to being outside in the sun very slowly and step by step. First in shade then a more sunny spot and so on.
Compare it with a human, if it's winter here and we go on a sunny vacation we will get burned aswell.