That's a good set of goals. :-) I hope you're able to make some satisfactory progress this week.

Re: the art supplies — you might want to consider starting by doing a quick purge of the "easy stuff" i.e. anything that's unusable because it's used up/out of date/dried out/just not in good enough condition to use. (This is following the advice of one of my favourite decluttering bloggers, Dana at https://www.aslobcomesclean.com, who points out that spaces/stuff start organising themselves if you just take away things that shouldn't be there.) It may also help you get an overall sense of what you have before you put a lot of effort into organising things that you then decide not to keep.