Boot Camp Assistant: error while formatting flash drive

Hello everyone. A few days I tried to install Windows 10 on my MacBook 13' mid 2010 running OS X Catalina. That was a horrible experience.

First I edited info.plist in Boot Camp's contents, everything worked fine until I started to make flash drive. I've normally chosen flash that I've already formatted(Fat32, master boot record) in Disk Utility and clicked on start. Boot Camp wrote that he is formatting my flash drive and when the progress bar was half full, it shows me error message "An error occurred while formatting flash drive"(this is an approximate translation from Russian).

Than I thought that the problem is out of non-supported OS X and installed maximum supported High Sierra. In this OS I couldn't even start program, it closed immediately after editing info.plist(no commands in command line helped).

Also I tried to install El Capitan, but it also caused a problem: installer is damaged. I read in internet that I just need to change the date on my computer but it didn't work.

Without despair I tried to make flash drive with command line. Most of files were copied except install.wim. It told me "/Volumes/windows10/sources/install.wim file too large". But part of this file was copied so I tried to install Windows. Laptop restarted, white than black screen and shows me a problem: "non-system disk press any key to reboot". I also tried to install windows directly without boot camp, but when windows was installed and Mac was rebooted after installing any software or drivers, it caused me problem with wrong start. And yes, this computer can run windows 10, I've already installed it on my old hdd (I changed HDD on SSD, so I can't access to old HDD).

I don't think that problem is with my flash drive, because I've installed with it Windows 7 on another average computer(We have 2 windows computers in my family) a few days ago. If you can, please help me with this problem