Friends don't let friends terminate twisted pair cable into 8P8C plugs. Without lots of practice it is likely to go wrong and end up with a poor connection which somewhere down the line will be intermittent. Decent crimping tools are also quite expensive.
I did this in my old place with a ten quid crimping tool and it involved a lot of cursing. I've been dreading doing it in my new place as it's in the cupboard under the stairs and would be as awkward as fuck.
Friends don't let friends terminate twisted pair cable into 8P8C plugs. Without lots of practice it is likely to go wrong and end up with a poor connection which somewhere down the line will be intermittent. Decent crimping tools are also quite expensive.
Punch down cables in your walls/floors to sockets which is much easier to do and buy factory terminated patch leads. If you can't screw the box to the wall you can use a surface mount socket as a flying socket, something like https://cpc.farnell.com/pro-signal/psg08000/socket-surface-rj45-cat6-single/dp/CS16167