FileMaker Pro Developer

Long story short, in 1995, I designed a number of linked FileMaker data bases to manage our manufacturing business. This was done on FileMaker 4.0. About 10-15 years ago, I wanted to update the system, but found out (after the fact) that I could not import 4.0 to whatever version was standard at the time. I waited longer and a few years back, I purchased Pro 12, with the intention of re-designing the entire management process. Best made palns. Now, hear I am, 22 years later with a mess of an old system (that being, not only the data bases, but me as well!). I am looking for someone that will sit with me, one on one, and help me wrap my brain around version 12 as it relates to my old verson. I think once I spend a few weeks with someone, on a regular basis, I could then just rely on them to respond to specific questions, but I don't really know for sure.