I'm the same started with a few my best advice is as the racing season is finished, breed as many as you can with your existing birds but if you really want to race with your 12 is don't send all of them away, send half as one's that do come back are worth keeping as long they are up in like 3rd or 4th place,one's that gets lost no point worrying about them. When it comes to young birds for next season train a lot if you can with them,same again balance out how many away as if all goes to race you might get a bad race and lose them all.