Aadesh Dukhande,
I used Create Form design extensively before I retired. The manuals are good. I think Bottomline, the vender, does provide training (probably at a further cost). The catch for both of these is you need to purchase the product to get access to it.
However I don't think the Create Form product is being developed long term, from what I remember Bottomline is trying to move clients to the Transform product. However my guess would be that the Transform manuals would be good and there would probably be training available (probably at a further cost) if you purchase the product.
It seems you are trying to break into the Create Form (or maybe the Transform) consultancy market. The cheapest way to do this would probably be to find a potential client who will allow you access to their manuals. I doubt they would provide training (if available) from Bottomline as it may cost them, unless you reimbursed them.
Others may be able to confirm the longevity of the Create Form product and the move from Create Form to Transform as well as the availability of Transform and/or Create Form training.