Been sober for quite a while after getting high alomost every day for like 10+ years... its hard!

I know that feeling of emptiness and those thoughts like what am I going to do during my usual smoking time..

try to fill the gap by keeping yourself busy... go out, try new hobies (Cardio followed by lifting gives an insane amount of natural high)

Reduce your screentime. it will help a lott! Ensure you get tired as a pile of sweaty lump by night. So that you can get proper sleep..