I’ve updated Tiny Theme for Micro.blog with a few quick changes & bug fixes. Improved blockquotes, fixed horizontal scroll bug, added accessibility improvements, improved link styling, added pagination to category pages, & fixed alt text for logo. You can upgrade to 1.0.5 on the plugins page.
@numericcitizen Boosting what @Mtt said, taking your existing theme and making small modifications is a fantastic way to learn. With some up-front effort, you can even do it on your local machine and see your changes instantly on save. I attempted to document that initial setup because it isn’t easy or intuitive if you never do this kind of stuff.