>>2922284take it one tiny step at a time. break everything down into individual tasks and try to just do one, give yourself an hour, try to do one tiny task. like lets say you need to replace a stove pipe, first, clean out the stove, unbolt it, and move it. that was task one.
task 2: disconnect the stove pipe from the couplings or supports and take it all down but for the chimney section.
task 3: deal with the chimney section and cover the hole in the roof.
task 4: install new pipe
task 5: refit stove.
do things like this one task at a time.
i currently have a very messy workshop i can't do anything in and need to build a new lean-to. first i will move a work bench in my current shop, to make space, then tidy up more, one small area at a time. then gather materials to make the lean to, then build it. just one little part at a time, this may take me weeks but it will slowly get done as opposed to sitting forever.