please add instructions on how to install kali linux on a HARD DISK PARTITION without deleting other partitions

[vahue221]

I tried 15 times.

I don't understand
I reread everything that is freely available and found nothing. Please help:

After choosing manual installation, this appears

After pressing "use as" this appears:

Do I need to undergo separate training to understand what this is?
and then, whatever I choose here - the next section "label "boot" cannot be changed to "enable".
WHY?

I don't need to erase the data on that section because I prepared it specially, separated it and formatted it in advance

then "change the size" an error appears saying that it cannot be done, well, that's not necessary.

"delete section" - also not needed, because I just made it specifically for Kali (this morning, 15 attempts to install Kali back).

I press - section setup is complete - error "root system not defined"

I basically need that system only because it erases everything when you turn it off.
maybe there is Is there something simpler or is there somewhere an instruction on how to install this devilish machine?