Window tinting

I have a 96 chevy Silverado king cab. Someone tinted the windows a long time ago and the drivers side tint is peeling and wrinkled. Is this hard to replace myself? Would it be hard to remove the window to tint it outside of the truck?

I have tried tinting a few windows on older vehicles before and could never do it. The stuff always got wrinkled or bubbles I could not remove.

Thanks again!