First of all, install virtual box.

irst u need to create a partition for your linux mint os... it is recommended to be at least 30 GB step 1 - download the latest linux mint from here step 2 - download Universal usb installer from here step 3 - plug your usb drive and open Universal Usb installer step 4 - create a bootable os by choosing linux mint from the drop down and choosing your linx mint iso file (the one u downloaded earlier) step 5 - restart ur pc and boot from usb by pressing F10 (or F12 - depends on ur pc) step 6 - wait for the usb to load and choose the 1st option that says start live boot (or smt like that) step 7 - Click on install install linux mint from the desktop step 8 - just follow the wizard but be careful if ur trying to install it as a dual boot. When that option step 9 - choose your previously created portion and specify the size of your root, home, swap ... that's it... but if u want a detailed tutorial here is a video If you are seeking additional help, and there is an Ethiopian channel for linux community... they would be happy to help

https://linuxmint-installation-guide.readthedocs.io/en/latest/