Get the class 1 done before you spend a penny on training if you have issues it will save you a fortune if you only want to do commercial.
If you can't get a class 1 go fly gliders or microlights you get much better value for money flying them as a hobby.
Once your class 1 runs out it degrades to class 2 rights for the class 2 period. You only need to bring back up to class 1 to get your commercial license issued.