In order to practice,  you have to pay attention.  In order to pay attention, you have to be able to clear out distractions.   I’ve written about cello guilt before for amateurs.  It’s the sense that you’re fiddling while Rome burns (which never actually happened, but it’s a good story).

I think that practicing on a disciplined schedule will help, because then there is no sense that cello is taking over other pending matters.  Even if that disciplined schedule is not quite adequate to make progress, having cello time be cello time is critically important.