If you've never painted before, hell no don't do it yourself!
There's a difference between turning a wrench, and knowing the specifics of paint, one a cave man can do, another you actually have to be in the business to fully understand.
I've seen people with cans of spray paint screw crap up, I'm not the best, but even with my limited skill I would NEVER trust myself to paint a car.
Paint isn't something anyone can just go out and do, and without a proper facility, you'll probably do it out in the open, and get to watch moisture bubbles open up and pop like wildfire across your bumper within a year, and that means you'd have to sand it all down again and start from scratch.
There's a difference between doing everything yourself, and doing what you can based on your skill level.
I don't know ANYONE that does everything they want because they "can"
No wait.. I do.. ricers, and their spray paint paint jobs.
Go to a professional; there's nothing wrong with that.
If you don't do it for a living, don't attempt it.
Painting is barely a simple procedure.
You can probably help prep the part by sanding it etc. which will lower the cost some I'm sure, but don't try to paint it yourself if you have no clue what you're doing.