Dealer Paint Protection warranty + Other options

[smuggymba]

Dealer offered a paint protection for 7 years for $399 that will protect the car paint from discoloration and fading, bird poop and will "seal" the paint with a one time application.

It also protects the headlights from fading. The headlights are expensive, do they discolor/fade in 7 years? I plan on keeping the car as long as it doesn't give me troubles.

Is it worth it?

Are there any other options to seal the paint manually? I'm not a DIY guy but starting to learn stuff. Can we just spray some kind of sealant?

Thanks for your time as always.