Giving advice?

My friend is trying to learn how to play, without locked screen and he needs help. Champions he plays, (Lux, Jayce, Ziggs, Lucien)

Any advice would be helpful from mechanics to key binding.

Soo advice on giving advice eh?

I'd advise you suggest key bindings that you find helpful. Also based on the the champions I would say that it might be better for him to learn how to quickcart/smartcast (whatever they call it nowadays). For things like improving CS, in terms of overall mechanics, it might be worth playing a few customs with him, with the sole aim of CS'ing and if it is something that he really struggles with try to take more AD in rune pages, it might not fit the champion perfectly but AD always helps a little bit. Other than that good job on the unlocked screen and best of luck