Wet Time Trial & 1 Championship

Hi,

Recently started F1 24 and enjoying it, just a couple of questions -

Am I right in thinking there is no time trial in wet conditions? If so, how can you practice for the race if it is in wet conditions?

Also, can you only save 1 x championship at a time, so you cant even play a one off GP to practice in wet say, as it overwrites your current championship and you would lose your current standings. Is there somewhere to go to to play a one off GP race?

thanks for help in advance.