I need to replace a busted out driver side back seat window. already have the glass but want to replace it myself

You need to remove the door panel to replace the window.
To remove the door panel, remove any screws that are in the vicinity of pull handles and door pockets. These screws will be under little trim covers that you need to prise off to get to their heads. Look for the screws around the edge of the panel and also the screw in the latch release handle recess.
The lock knob, if there is one there, will have to be screwed off and then carefully work your way around the door, freeing the panel's clips from their holes in the door frame. (Doot panels are brittle and clip break out easily).
Finally the panel will probably have to be lifted out if the window slot. (If the panel does not come off, work out what is retaining it and remove that screw or slide it off the clip that is still holding the panel. Disconnect any electrical plugs behind the panel. Under the panel you will find a plastic dust sheet that is stuck to the door frame, remove this carefully, you will have to replace it before replacing the panel.
Once the panel is off, you will see the attachments for the window retaining chanel and how it is attached to the winding mechanism. You may have to loosen off the bottom window runner attachments as well. Once everything is disconnected, remove the old parts and then you have to work the window in through the slot at the top od the door, slanting it so that it will fit into the door. Then align it in the runner slots and attach all the fasteners again. After you have put everything together, check the operation of the window before replacing the panel. It is a fiddley job and you will be working through limited access ports but it can be done - good luck and please rate this response.

Dear,

To change the glass you first of all need to open the inner board of the window, where the handle is situated.

then open the bracket containing the broken glass and all the intermitted parts which is in the way to a new glass.

After that put the new one and reverse the order............

take care for the obstructed parts

thanx