I would suggest you read the "Forklift Diaries" as there is an article from somebody who set up a business as an FLT Instructor.
As for gaining experience in the commercial world of training, it is a case of contacting training companies who are looking for Cat 1 instructors and offering opportunities that suit your availability.
The issue being whether they will accept your training experience as sufficient to employ you. It is unfortunately the catch 22 situation of cannot get experience without a job and cannot get a job without experience.
Also, it can be the issue of your certification being AITT and finding an AITT accredited company who are looking for sub-contractors.
My suggestion would be to start looking at the AITT website for training companies in your area and then contactingthem to ask if they are hiring.
There is work out there, but you will need to find a company that will give you the initial start. Good luck.