Sheet metal damage is relatively easy to repair [at least at the level shown]. On this side of the pond, local schools offer 'adult education courses', which are basically apprenticeships which are intended to 'teach the unemployable a trade'. In reality, they end up being used by young people - just starting out, who are not afraid to get their hands dirty, and who find themselves in the same position you are in. I took advantage of one of these, and for about 2 quid / hour i got a lighted, heated shop, with an experienced instructor [whom i shared with about 18 other students], and a decent collection of sheet metal tools. If the door is distorted [i find it hard to tell with the resolution of my monitor], you may have to take the door apart to get to the inside. Try to NOT break any of the little plastic clips when you do so - they are hard to find replacements for - particularly for older cars. Ones you find in wrecking yards tend to be brittle due to heat also. Pick up a book on sheet metal repair. There are a number of good ones out there. My instructor showed me a few useful tricks. As i had been working on my own for a few years on similar projects, i managed to show him a few tricks too. Best of luck!!