go down a rabbit hole of "how to design car wrap in photoshop"
find some cool vids that get the creative juices flowin', and then duplicate all the steps shown. then, duplicate the steps again but from memory, using your own logo/images.
this, however, assumes you have a solid background in AI/PS. if you do not, start with linda.com and work your way up through the tutorials. design becomes easier, when you're fluid with the tools available to you, & especially when you learn the shortkeys.
Can I buy the backgrounds and templates for the wraps? How does one incorporate someone’s logo into the wrap?
All that'll do is make you able to install wraps. The OP asked about designing.Buy cheap wrap material and wrap your own vehicle a couple of times (with the help of youtube and I'd highly recommend subscribing to the wrap institute). Cheap material is like a cheap guitar. If you learn how to play on a cheap guitar, you'll be amazed at how easy it is on a Martin or $3000 Taylor. Anyway...
Then go to as many of those courses that unclebun just sent links to, that you can afford. Become certified in as many of them as you can although it's not necessary, it's a great idea.
These, I believe, are the right steps to quickly becoming successful and becoming a valuable member of the wrap community. Good luck!
Oops. Sorry about that. I should have read thoroughly. Not sure why I jumped to that conclusion.All that'll do is make you able to install wraps. The OP asked about designing.