BPM is really turning into a technology field, these days. It requires a strong knowledge of things like Process Design and Re-Engineering as a foundation but it also requires detailed knowledge of things like BPM Tools, Workflow Tools, Rules Engines, Scripting/Coding and so much more. Even the simplest Workflow Tools require some level of Technology knowledge, like Coding of reusable functions.
My first recommendation would be to go back to school for an IT education and to build IT knowledge, if you can. However, if this is not an option, then I would recommend looking at BPM and Workflow internet sources to train yourself. Some of these sources are:
I hope this helps.