How to resolve errors while installing ubuntu-18.04.0-unity dual boot with windows 10?

Question

linux

I want to install 2 ubuntu OS on a free 128 GB SSD drive.
Notebook lenovo 330s-15ikb old bios, made a bootable flash drive without UEFI, for old bios.
1) the problem that I noticed ubuntu does not see the OS, when choosing the directory where to install Linux on the disks where windows is installed, it writes use = unidentified.
2) when splitting the directories /, / home, if I don’t create the / EFI partition, then the installation ends with an error and grub is not installed.
3) when I installed ubuntu with the EFI directory after entering the password, it starts an empty desktop, I can’t display the console if I press alt + cntrl + f1, it freezes stupidly and lastly, when I want to switch to Windows, my grub stupidly doesn’t start windows s.m p. 1
I think the first acquaintance with ubuntu is spent.
smashing my disk could be the problem