Already did that and have everything set up, my problem is more getting my friend to be able to connect than setting things up currently, although I do struggle there - learning phase do be like that
I highly recommend to do the easiest step: Use VMware and choose to replicate your current LAN device. This way you can just use the same configuration than on your current pc except for the ip address of course. It makes things so much easier to setup.
Otherwise you'd check on how networking actually works. It's no use to simply replicate a tutorial, you'd understand what you're doing there and what each of these options actually do.