Does it matter who you pick? I put an apprentice on to keep weight down but never seem to win or even place, yet normal jockey adds 13lbs and comes 2nd by a short head, just feel less weight might get win? Thanks

If you sort the jockeys by their fee, the top 5-6 usually have a better win rate. Apprentices seem to misjudge more strategy in the races which is why more experienced jocks ride better. Apart from that I think it doesn't really matter too much.