No, you cannot. Sorry.
No, there is not. The only demand is that you are enrolled as a student, of which proof is requested.
No, sorry. We aim at academy students.
No, sorry. Even though your situation might be very much like that of 'official' students, we have to draw the line at some point.
Yes, you may sing it, but no, this does not exempt you from the obliged languages English/German/French/Italian.
Yes you can. The limitation is only that you sing at most two songs from one cycle. Still, it is not advisable to only put Schubert on your list.
No, please read the requirements carefully once more.
No. An English song by Haydn does not count as English, as Haydn belongs to the German language-culture. In consequence, Haydn's English songs do also not count as German! Similarly, Beethoven's 'An die Ferne Geliebte' counts as German, but his 'In questa tomba oscura' does not count as Italian (nor does it count as German). Please realise that this requirement affects at most as few as four of your songs. You have another eight to cover any language you might like to sing, including e.g. English songs by Haydn. Please note that the 'English' section includes the US, Canada, Australia etc., just as the 'German' section includes Austria, Switzerland, etc..
No, it does not. Please read again the explanation on 'language-cultures' on the Repertoire page.
Unfortunately not. Please understand that the jury puts considerable work in assessing your recordings.
No, you will have to take care of this by yourself.