File-Naming Convention

[wagb283]

I'd like to go with Jellyfin, but have some questions.

I save mp4/mkv movies using this format:
e.g.:  Wrath.of.Man.2021.mp4

Series are similar, but with Season and Episode and without the Year:
e.g.:  The.Last.Ship.S02E07.mp4 

I've built a C utility that searches based on full-title, any word in title or year.
I use this to keep from duplicating files I already have.

* Will Jellyfin require me to change my file-naming format, thus breaking my search utility and other automation I have in-place?
* Can I configure it for 'local-only', so it doesn't try to go out on the net to download any titles (posters and info are ok)?
* Can I control the size of poster and which info it gets from TMDB or IMDB to keep the cache as small as possible?
* Can I control the cache location separately (drive/dir)?
* Will it update it's db on-the-fly with a 'listener' or dir-mon when any adds or deletes occur?

I'd like to avoid going through jellyfin's UX for each dir change/update, especially for multiple file adds/dels.
Just thought I'd ask first, always easier than finding out 'the hard way'.

Anyway, Jellyfin comes highly recommended, hope I can use it! Thanks for any info.