First find out if new glass is available. If not, be extremely careful removing the windshield it could be your only source. Aftermarket glass generally is much weaker and easier to crack so if the donor glass is not original it will require much patience to remove intact.
I do almost everything on my cars myself glass installation is not one of them, it requires experience and special tools. Don't even try. I recently had
Glass Masters south location come to my house and install glass on an 80's vintage Toyota they did a perfect job.