Hi Amanda...welcome to the forums. The courses are a good foundation to work off, some of the guys on here have only done the 4/5 day courses themselves and are doing well for themselves.
If you start off slow maybe doing some smaller type jobs around looking after your littl'n and don't expect to hit the ground earning £30-40k per year and you use us lot on here whenever you get stuck, you will be fine mate.
After a while your speed will improve and you will gain confidence etc and you could start earning a nice living while leaving yourself enough time to have a life outside of tiling.
Good luck
Toby