Firstly - no need to apologise for your English. You do a very good job making yourself understood in a foreign language. I don't think you will find that many native English speakers here who could do as good a job as you in German (or Dutch, Spanish, Swedish etc). Not this one for sure
As for your photo - there are a few problems which would result in a rejection here. The aircraft is not centred correctly for A.net - for that you would have to crop slightly closer to the tail, and quite a lot closer to the nose so that both sides balance. Then the aircraft would have to be a bit lower in the crop as well - as it is now, it sits slightly high in the frame. It would have to look something like this:
There are then two other key problems - that strong highlight along the fuselage is just too bright - all detail is burned out - and there is little you can do about that. Maybe you have a shot a second or two before or after, where the plane was not catching the sun like that? The aircraft also looks rather soft, and in your editing you would need to sharpen it somewhat more. Contrast is always an issue too with harsh lighting like this - but you can almost forget about that for now due to these other problems.
Let us know what editing software you have available and it will be possible to help some more. If you are able to post the original file, an alternate edit can be done for you.
All the best.