I apologise in advance if I’m not posting this in the right section as I’m new to this forum

I’m applying with 5 year tier 2 +ilr (1 year)
If someone could answer the following queries I would be very grateful:
-I would like to apply for naturalisation asap and get the process started. My current passport is due to expire in 5 months and I will have to renew it since I’m guessing the citizenship process will take longer. Would this be a problem? I’m happy to send the details of my new passport to add to the application later but I don’t want to unnecessarily complicate the process. I did see change of address forms but didn’t really see anything related to passport details.
-I have read that I’m allowed to travel while the naturalisation process is underway, I have asked a friend to keep an eye on my post but I will be taking a break from Uk for a few months next year to help out family with some projects. Would this be an issue? Or is it preferable to postpone any long breaks till after a decision is reached?
Thanks in advance!