Go Xpel. You can buy from some suppliers online in big roles.
PPF is an arts and crafts project, not a car project. If you are handy with crafts, you can do PPF well. And if you screw up, peal off the piece and do it again with another piece. You learn the techniques by practicing, and you also learn the right mix of soapy solutions and alcohol solutions. That is incredible keys to get those mixes right or it won't go well, but trial and error is your friend.
Have good knives. Try not to cut on the paint, but if you practice on some test surface, e.g. a panel you buy at the junk yard, you can learn how to safely score the top layer and pull off the piece without every endangering your paint. I prefer to use bulk and wrap the edges as much as possible so I have less scoring to do over paint.
Once you learn how to do it, you can save big money over and over again as you buy new cars, or it comes time to replace the film. It doesn't last forever, especially if you park outside all the time.
And don't think the pros can't do damage to your car. Many people have pulled off old clear bra to find out that the installer was an idiot and cut all the way through the film and down to the metal. You won't know if they screwed up your paint until you take if off years later and they are gone. And some idiots put adhesive promoter everywhere to make their install life easier, but it's an absolute nightmare to get the film off later.