First try to apply to theatre schools on London - the trip is cheaper.
I think your application has to be there before February. You will be called to an audition. The school will decide if they want you.
Also you can do the same in USA and first go over as a tourist and have an audition.
About 90% of all actors are out of work. That is for UK as well as USA.
You cannot work half day and act half day. There are rehearsel often before the play.
Rehearsel before the play starts is often not even at the theatre but somewhere else. In London it can be 1-2 hours away from where you live.
After your education you often have to be actor without getting paid or getting paid very little just to get a name.