The 2 day and 1 day training you propose is a good start.
However you can never get enough training.
Maybe you could contact a carpet cleaner out of your area and ask can you work along for a day or two. Where you from?

I helped out a newbie last week for a day and start this afternoon with another.
Point is dont think 2 + 1 days will be enough - you only have to mess up on one job and you out of pocket a lot ie a carpet or a suite you dont want.
The basic equipment you will need to start anything worthwhile is a 2 vac portable with 135psi. Should get something around £1000. If it has the wand and hoses and perhaps a hand tool you have some gear.
If you relying on window customers do remember if you clean their carpets today you may be fortunate and see them in 12 months time but that is not always so.
You need to generate customers. Recommendations cost nothing except you doing a top job for someone to start talking about you.
Anything else and it will be an expense.