I’m trying to make a door to act like this:
Mine is acting heavy, and sometimes the player can’t even push it:
I am also using Group Collissons, it helped a bit, but not the way I expected

I’m trying to make a door to act like this:
Mine is acting heavy, and sometimes the player can’t even push it:
I am also using Group Collissons, it helped a bit, but not the way I expected

Try putting this script into the door
(If you having streamingEnabled in workspace, this might not work. If so, try disabling it unless you really need it.)
local Door = script.Parent
local Backup = Door:Clone()
Backup.Script:Destroy() -- or whatever your script is named as.
Backup.Parent = Door.Parent
Door:Destroy()
Now, if it’s just heavy, then select the doors biggest part, enable CustomPhysicalProperties, and set Density to a lower value (Try starting at 0.1 or a bit higher.)
From your clip, I think I observe that the door hinge is clipping into the neighbouring wall. Try making the black part (which I’m assuming is the part to which you have hinged the door) Cancollide