How do perks open, explain to noob?) (Fallout 4)

You have no point earned per level

Well, you choose this perk when you have a point to level up. what's the problem then? Or you just don’t have glasses.

Robik Bobik
was a point perk stupidly does not open, everything in a hurry only had to be pumped

you had to choose a skill and swing it, just as you swung the skill in a hurry

I passed the quest again and got a point, I clicked on the perk, it wasn’t pressed in any way, I thought I don’t know something or I don’t understand.
I do not know what it was, but I had to restart the computer.
Restart again passed the quest, I managed to press.
Thank you all who responded)