Thank you for the answers and the support!

Sorry, I didn't understand “a close by hackerspace”

I didn't ignore the levers, but I think I'll try again to settle well the cable when I'm back at home, since some keys resurrected after trying several times, e.g. F10 (yay, BIOS!), but not F11 nor Enter, nor space and others :(

If that does not work, I don't know what to do, maybe buying a keyboard and making this little laptop (i386 Atom, 1GB RAM) my home server (I decided to go selfhosting in 2014, but still didn't look anything about hardware, and my budget is low).

No PC at home though, this is/was my only computer :(