Oh my god,
2 Etudes a day, that's absolutely impossiple. First of all, I doubt you you have the technique (at the age of 15) to learn all of them, for they're very different from each other. And secondly, whether they'll sound fine will depend on your maturity, you can't develop such a musical understanding in just 2 weeks.
Martin, the Chopin are more than just virtuoso-etudes, they're of a very hogh musical niveau. I've played three of tehm (op. 10 no 12, op. 25 no. 2 and no. 21) and it took me almost two years to get it up to the right speed, and even now they don't sound perfect.
Concerning the Lizt sonata, have you ever taken a glance to the notes? It'S one of the most difficult pieces ever composed.
sorry but that'S not doable, as 88keys said it, not even by the best pianists.
Just an example: it took Horowitz 2 month to study the lizt sonata until he decided to perform it.