Can't work

It's my first full time work from home job and I'm unable to work for 8 hours. Daily misses target, and I'm not even sure I'm working for 8 hours.

Onboarding is still not complete so TL is not getting our reports (targets done/hours logged in) yet so she is not overseeing much.

How to make my mind work this much, and after this do workout and upskill myself.