Example:
In this article about bugs I focus primarily on 7-legged bugs and
purposely not consider spiders as it would require me to [look into
and explain the details I don't want to here] them which is not the
point here.
In a way, it's close to to dirty one's hands with smh but without a negative connotation.
I'm quite confident there's a word for it, but I just can't remember it. I think to dip into is close, but too casual (slang-ish), I'm looking for something for more formal writing.
Best Answer
"To look into something else" and "get sidetracked" is to fall down a rabbit hole.
Merriam-Webster calls a rabbit hole