At 21.4mh, it's going to take a LONG time to find a share.  If you check the p2pool output, it'll tell you the average time it'll take.  Wildly guessing, maybe 1/2 a day.

M

There are two different kinds of shares.  Your miner reports finding pseudo shares that are typically difficulty 1.  P2Pool's console output is reporting real shares that are difficulty in the hundreds.  Most pseudo shares are not real shares.  As someone else mentioned, the p2pool console output also includes a line that estimates how long (on average) it will take to find a real share based on your recent hashrate.  For the record, you are wasting time mining with only 21.4 MH/s or at least wasting electricity and money even if you are doing this just for fun.  It will take you an insane amount of time to find a share and your earnings will not outweigh the costs of your mining.

Alt-coin merged mining is not pooled.  When you find an entire block based on your own mining effort, that payment will appear in your alt coin client just as if you were solo mining that alt-coin.