Sorry for the late reply here too, and thanks for your e-mail! You've probably already figured out that you can change the :var in the second babel block to point to a different table (ex: :var source=another_table) named with #+NAME: . The tags you've defined with #+TAGS: are file-level, but it's possible to change the function so that it can take an optional argument with a tag hierarchy, so you can make your own structure.
There used to be one in Sao Paulo, but I think the organizer stopped paying for the meetup.com subscription. There's still a meetup page for one in Pelotas (https://www.meetup.com/Pelotas-Emacs-Meetup/) which is inactive, but maybe it can be turned into an online meetup? EmacsATX uses Google Meet; I can also set you up on BigBlueButton if you prefer something that uses free/libre software.
Maybe M-p?