First scrape - argh! Advice requested for hiding my shame!

Hey all, first post - "pistonhead" is maybe not the best description of me but I'm sure there's no better place to go for advice. I hope you won't think too badly of me for what is likely a bit of a drive-by. (Does a car pun help???)

I've acquired a new, small but deep scrape in my car courtesy of a gatepost's hinge. Oh well, I'm sure it happens to everyone sooner or later. As a new member I can't post links, but pictures will probably be useful; I uploaded a few to imgur and they're accessible under `/a/PjyHWoH`. it's roughly 10-15cm long, so not huge. I think it'll be possible to touch it up so it's not too noticeable, though both the door and wheel arch are dented a bit.

I don't mind a DIY solution but wouldn't want to spend ages on it. If I get no advice I'd be buying a matched pot/pen of paint and following some youtube video. However, I don't know how far to take it: I've got no fine-grit sandpaper, polish and so on, and I know that the full method is fairly involved with several stages of preparation, layering, sanding and polishing - so really what I'm looking for is advice on the relationship between effort and reward here, i.e. is just filling a small scratch in with a couple of layers likely to hide it reasonably, or do I need to suck it up, get a few grades of sandpaper and dedicate an afternoon to it. Or alternatively, what kind of professional service might do this without charging an arm and a leg? I might get it fixed properly in the future, but not yet, because a new driver will soon be insured on the car and we both agree that it's at further risk

Finally, it's important that this doesn't get any worse. I can see that the paint has cracked in one spot and lifted in another, and with my inexperience I can't tell how many layers of paint this has gone through, so whether I need to take extra care in those spots and/or to seal against rust.

Thanks for your help!

Just thought I'd come back and mention how I got on. I tried round a few places, both body shops and men with ven. Only ended up getting two quotes, as two out of three mobile outfits were unable to do it, lacking the equipment, at least on their vans. (One place offered an appointment at their shop, but it was out of town). The body shop quoted £1500 and the mobile repair guy quoted £300, so you can guess which I went with.

That was at about the top end of what I wanted to pay, but something needed doing. I got the result I wanted - you can see a ripple in the metal if you look for it but it's not noticeable. Hopefully no issues - he redid the clear coat on the entire door panel and talked through some aspects of the job when I had questions.

Glad to have it behind me - and now I never bother trying to swing into my gate in one go, I always reverse a bit to go in straight.