yeah the docking keyboard would help you a lot but a normal usb keyboard should work just fine. i dont have the same model as you but i would guess that you have quiet boot and secure boot option enabled by default so just plug in a keyboard and spam the del button when booting to enter bios. then disable secure boot (it could be hidden in advanced options which i dont remember how to enable but its not something hard). Anyway, the easiest thing you can do to play around a bit and try new things is to create a usb live stick with android whatever version you like, by downloading an iso containing an os (examples : Remix,Phoinix,Lineage,Android 7.1 etc.) and by using a tool like rufus make a usb flash drive bootable with the said iso image. Then you just restart and press f10 (or whatever boot option button your device has) and boot from the usb. The ones i liked the most are Phoinix and Lineage Os(from androidx86 site) but they dont have drivers for touchscreen for my version, yours could work.