My biggest obstacle to decluttering has always been physical. I know others who have the same problem. So, if physical limitations are holding you back, enlist the help of a family member or that rare willing roll-up-their-sleeves friend.
Take it slow, bite off small chunks of that big task. Celebrate small successes because tomorrow is another day. Tackle something else then or continue working on your current "small chunk."
However, just because decluttering is daunting right now, do not add to the current clutter. Maintain the status quo (yep, spoiler alert, cleaning required) and try to do at least one additional decluttering bite or area each day.
I might be a turtle instead of a rabbit, but I’m slowly doing the “get ‘er done” thing.