I've tried using Font Forge before and been stopped in my tracks because of a high learning curve.

I've tried using Font Forge before and been stopped in my tracks because of a high learning curve. But this looks just the thing that might help.   You can find FontForge (Win/Mac/Linux) at http://fontforge.github.io/en-US/.
http://designwithfontforge.com/en-US/index.html#