Make sure to adjust your bike to your size (height of the seat and of the handle bar, and if possible the length between the two). Don't hesitate to ask for advice.
Memorise your settings for more comfort once you've adjusted the bike.
Try to pedal, in so far as you can, in a regular fashion so that your pushing is equal to your pulling phase.
Don't forget to drink during the sessions.
After each session don't forget to stretch, to relax and to drink on a regular basis during the day.
Please respect instructions during the sessions especially those pertaining to pace.
As soon as you start, monitor your breathing by breathing in and breathing out in a global manner, stomach and chest.
Keep breathing comfortably, but also feel comfortable altogether.
Comfort and enjoyment should be your priority.
You can adapt the intensity to the way you feel during the exercise.
Ideally, try to workout on Wednesday and Saturday or Sunday.
Now go!
GOOD LUCK.