The fork of microemacs he is known for is from the 1987 version of microemacs - so, before pico (parent of nano) split off of it, even.
So, I wouldn't be surprised if it doesn't have ctags support..
... but it's grandchild nano does, and has since like the 90's/early 00's I think. So, don't even need to learn proper emacs, nano is already a huge step up while being in the same editor family...