I recently dual booted my Lenovo i7 windows computer to use Ubuntu 22.04.03. I initially freed 100 go of memory for the OS but I realize that it is not much. My computer is 1 To. I understand that I need to boot in windows to partition my disk, but the subsequent steps seem tedious. More precisely, I wonder :
How much space should I leave on windows for it to be safe, since I don't plan on using it very much. Is 75 Go enough?
Once I have made a disk partition that is not allocated, how can I merge it with the one where Ubuntu is? (or maybe it can only be done by re-installing...)
I saw that you can partitioned the disk so that Ubuntu OS and my home user are on different partitions. What would then be the advantage of doing such thing, and could it cause problems with e.g. packages/software that are on the OS disk, and not on the user disk, or vice-versa?
I have made a .txt file for all the modifications I made in my OS (e.g. sudo commands), but I don't have command lines for initial software installation. Will I have to re-install everything that is not on this file?
I would appreciate overall any guide/indications for selecting disks when rebooting Ubuntu.
Thank you very much!