Great!

Hi there. You have a nice start. The most important thing you need to learn is to keep your line widths consistent and letterforms balanced. Those are difficult things to master. Take a longer look at some professional typefaces — even those that are not modular — and see how they handle things like the bowls of the 'B' and widths of the 'E' and 'F'.

Diagonals are a challenge in FontStruct. With Riged, I think you'd be better served by avoiding them where possible and going for a more square face with right angles on the 'K' 'k' and 'R'.