Timing/length of notes, and also foot tapping

Notes and 'time'

I am coming back to playing after a very long absence (20 years or so). I have forgotten what the notations mean, i.e., their time or length.

After that, some tips for "keeping" time? I know there is always the trusty metronome. I can go that route if needed. The other problem I have is that I am not able to 'toe tap'. My poor brain cell just will not allow me the luxury of toe tapping AND playing.

Any suggestions? Please?