Learning chess, make me feel exhausted

Hi, firstly sorry for my more than average english.

I started chess a week ago with the objective of getting better at the game.
I have a lot of free time and i play 4-5 games of rapid a day and i do 1 hour of problem.

The thing is, im scared of launching games, and when i do and its over, i analyse my mistakes and what i could have done better but then , i just feel like i have to wait to play another game

I see people playing 7-8 games in a row when 2 feels like a burden to me. I really enjoy playing but for a reason it stresses me out and make me tired

am i maybe to mentally challenged for this ?