I've just returned from OBA where I completed my PPL.
Clouds were rarely an issue, it was always the gusting winds. The school had a policy where PPL students couldn't fly solo if the winds started gusting.
If you are lucky then you get the plane in the morning when the wind is normally 0. Starts picking up by 10 and usually started gusting by midday.
Everything seemed to calm down by 1900 tho and was beautifully smooth at night
Some of the student there were waiting 10 days for a chance of their QXC. I got lucky.
Which school are you going to?