I see your problem erikfzr. A finish is necessary to validate the maps and thus simplify judging.
I suggest you to place three finishes directly above the first block, which is NOT your track anymore, and then add enough straight blocks/connectors to place another finish you'll drive through on the ground.
Those three finishes will be clear enough, as there is not scenery at all. (I'll make a note of it for future stages
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Okay, Lolig, actually it is up to every builder what style he wants to build in. Thus we will get a very diverse track in the end. However, I do not suggest a fullspeed start, as it narrows down future possibilities quite a lot. I don't forbid you to build a fullspeed start, but I recommend to not build one
Regarding the judges: Everyone will be a judge and therefore your part should be accesible to a lot of players.
EDIT: Please center the thumbnail of the track on your part, to make it easier to identify parts in the judging form later one. (You can change the thumbnail under extended options "Hammer symbol")