Replacing a windshield on a modern car is not a DIY job, besides, a broken windshields are covered by your insurance with no deductible. Call a Automobile glass replacement service and have them replace it.
I have a 1996 Sunfire 2 door hard top that just cost me $160.21 total for the mobile team to come to my residence to replace the windshield. I was quoted as high as $270 so it does pay to call around for estimates.
Your wiring is probably messed up, happened to me. Locate the wires from the blower to the controls check them and replace as needed. Assuming no wiring problem check and replace the blower motor resistor.
This question has come up several times. The answer seems to be to remove the housing around the steering column and look underneath. There are two flashers. Replace the one on the right. but don't quote me, OK? I stole this answer from one of the other posters