I have had pretty good tasting results from the ciders I have made, to the extent that several batches have not actually survived long enough to reach bottling.
There are some interesting flavors that develop over the time it is in the fermenting vessel. Well worth trying it to see.
As far as ruining it, consider that cider has been made for centuries in barrels with either a wooden lid or a clean(ish) bedsheet or similar cloth for a cover.
While some paranoia about cleanliness is merited, it gets rather more attention than perhaps it needs, as far as worry goes.
Try to remember that the apples were sitting outside, the whole time they grew, subject to wind, weather, and blown dust containing who-knows-what.
Not saying that some care is not merited, just that worry likely isn't.
TeeJo