Dan what state are you in?
I cannot agree more with Nick.
If even considering this as a career. The above mentioned book will save you hundreds of headaches and thousands of dollars.
If you are not willing to buy and read that book first then you likely do not have the drive to enter this industry.
You can learn from thousands of others mistakes and successes just from that one book alone.
Just by reading it you will get a feeling of what it takes to be really successful.
By the way make sure if you do take this on as a full time job you factor in the best insurance with full dissability coverage and set up a retirement plan. Without those things you will end up broke and poor as a old man.
Consider starting working for a established inspector befor jumping in with both feet to see if you really like dealing with all the jerks this industry has in it.
The hours will suck and you will have to bend to meet everyone elses needs. Your desires will become the least important to all involved and if you are used to making your own schedule and doing things as you see fit you are in for a rude awakening.
I am a Florida Licensed General Contractor, Florida Licensed Home Inspector and Certified Master Inspector. Feel free to contact me any time to discuss anything on your mind.
This is the best Org in the world and I highly recommend becoming a member if you wish to become a Home Inspector.