Planning to convert BTC to altcoins for the first time.

If i were to send BTC to changelly, but I set my transaction fee very low (example : 0.00001 btc), so in order to get 1 confirmation I might have to wait 2 or 3 hours.

So my question is, do changelly process 0 confirmation? or will they wait for at least 1 confirmation before I can get my altcoins?