A slight dent in a door panel? I agree with the others, unless DIY is acceptable.
If that then, if it's a shallow dent, you'd want a tube of red body putty, some sandpaper, and then primer and touchup paint. You can get the touchup paint by paint-code at PaintScratch.com. A spray can of it would cost you about $25 -- I'm guessing the other materials would bring the total outlay to $50.
As for the touch-up paint work. You could be tempted to paint the entire door panel, because the difference will otherwise be visible. If the paint match is very good, you might be able to reduce the visibility with application of Rubbing Compound after the paint has been dry for a few weeks.
It all depends on how much you have invested in the vehicle, how much of that has depreciated or how old the vehicle, and your tolerance for imperfection. I would fix it if paint is missing from the dent. If not -- leave it alone.
Here's a story, since I'm feeling voluble this morning. I recently had a parking-lot "tail-light' collision with another car, deemed as 50-50 fault by my insurer. My car is 30 years old, and I don't carry full collision. I shoulder the risk for an old vehicle myself, and it saves me money. There was also a crease in the associated rear quarter-panel.
So I went to a body shop and asked for estimate of what they would charge, and I was quoted $1,200. Then I went to EBay and purchased a pristine, flawless tail-light lens for $70. I purchased a can of fiber-glass Bondo for $10 or $15, some sandpaper, primer and touch-up paint. I used a slam-hammer to pull out the dent or crease, but it wouldn't have otherwise been necessary and just as easily filled with the Bondo.
It was all of around $150. The paint is a perfect match and the dent and paint repair is invisible.
Still contemplating purchase of a new hybrid-drive-train vehicle, in face of the tariff uncertainty and other factors, like avoiding any serious reduction in my extra retirement nest-egg. But as long as my old Trooper continues to run like this, look as good as it does, and as long as gasoline prices are reasonable or affordable for my monthly and annual miles, I'm good to go, as they say.