I love these notes, they're fun to use! I tend to have an overabundance of coding in some posts, so I did things a little differently.
For the paragraphs, instead of putting style="text-indent:24.27px; before every single paragraph, I put the entire post, or block of writing to be justified, inside of a <div style="text-indent:24.27px;"> tag, along with the extra attributes I want to add.
Then, it's only a matter of inserting <p> at the end of each paragraph and turning off auto-format. It's only slightly different than what you've done here but, for my purposes, cuts down on too many extra characters (and coding if something breaks).