I don't think you need any "fancy" metronome, either. Just a plain brown metronome. Just concentrate with it as you play a few minutes a day and absorb it so that you end up with a metronome in your psyche. I know that sounds odd, but having had rhythm pounded into me as a child (my mother was a music teacher) I think it is quite possible to learn it, or at least to turn on the rhythm machine that's inside every human. Rhythm is part of our human heritage, we just get out of touch with it.

Actually, have you studied any music theory? It helps to know how the music is structured, and if you're very left-brained, the mathematics of it are beautiful.

Good luck, and a one, and a two,

WyoWoman