Very common Dave. All I can suggest is to put on a metronome at the slowest tempo possible and just keep working it. Probably not what you expect to hear but it’s how I did it. 

here is a video I made a few years back in an attempt to encourage us older learners to keep at it. Hopefully you get something out of it and will continue to practice 

https://youtu.be/xOUwb-XYfxM?si=GfuBvwGONuNtVP5o