That job is not to bad about an hour.
You will need a 10' roll of 1/4" round butyl tape.
A plastic scraper tool to remove the old tape and broken pieces of glass(wear gloves and glasses)
A shop vac.
A replacement glass.
Once you remove the trim it is pretty straight forward.
Remove broken glass and old tape.
roll out new tape along pinch weld with a 1/2" overlap seam at bottom.
Do not touch the surface of the tape as that could compromise the seal,leave the protective wax paper on the tape until ready to set the replacement glass.
There should be two rubber blocks below the glass to keep it from sliding downward,set the replacement glass on these and then push it into place evenly with firm pressure.Once the glass makes contact with the butyl tape you will not be able to adjust it much,so try to center it well before total contact.
Do not use any metal tool to try to move or adjust the replacement glass,if you need to adjust the position ,you can use a plastic tool or your own body pressure through your hands,this glass is tempered so it will not crack or break from soft pressure.
good luck.
If you have any trouble finding a good used glass,E-mail me.