question about editing, deleting and viewing photos on a PC

Hello, I am considering Immich as a Google Photos replacement. I however frequently use PC web app to go through my photos deleting, cropping and doing edits on them and then syncing the changes back to my phone. I hope this is possible and reliable and Immich mobile app provides sync from server functionality. Next I wonder about the file structure. I read that the original file names are not preserved during upload and there are some special system folders, so it can't be in any way similar to my current local photo library right? I read there is some storage template where I can specify filename format at least, but if I use date and time, does it take this correctly from EXIF? And EXIF data are preserved in files. Basically I am wondering since I will be hosting it on my server, if there is any practical way to access and do something with the files via explorer or I always have to use the web app, otherwise I might break or mess up something in the Immich's database...?