Starting REXX

Hi,
Can anybody please guide me in REXX?
How to start? Which Book or any tutorials avalable on net should I follow?
I want a mainframe id for personal use? From where it will be available?
What will be the cost of it?
Can anybody please guide me in REXX?
How to start? Which Book or any tutorials avalable on net should I follow?
I want a mainframe id for personal use? From where it will be available?
What will be the cost of it?