Don, if you can swing it financially, make arrangements to fly to Oregon and connect with the RV-12 program out there.
I do not know all the details but my hangar neighbor was in similar situation, did that, and is flying his RV-12, in fact flew it to OSH.
Someone out there is giving 12 instruction, you've got to go for it having spent so much time building the airplane.
RV-12 Build Helper
The RV-8...Sold #83261
I'm in, dues paid 2017 This place is worth it!