Hello, before I start, this post will be vague on some levelnfor my privacy, thanks for understanding.

Now onto the main question, that being: how to preserve a very needed and fragile windows ecosystem on a laptop(need it to access certain services) while decreasing the amount the existing partition has and deleting another.

I have one drive 256 GB, with two partitions on it. C:/ and F:/ respectivley. C:/ contains all the windows 10 related stuffs plus few docs and programms, accounting for about 50 GB for some future expansion. While to all my knowledge that F:/ partition has no exact use. What I am asking is, is it possible to decrease the partition C:/ amount of space taken to about 50 GB, delete partition F:/ and then to populate all that with a separate Linux OS? While also not freaking out neither the BIOS nor the Windows as not to fail anything. I have full system and admin rights over it, and access to (though time is resetting to 2001 each time I start, afraid of touching it, doesn't affect windows) BIOS. Once again, it is very important not to break anything and to not freak anything out.

Any input is appreciated, thanks lots!