Consider the humble “em dash” — some people use it to interject a completely different sentence in the middle of another — the next time you’re trying to avoid parentheses.
You can, although probably should not, use semicolons; they can be used to join related statements that could, very frequently, also stand on their own.
The thing is - and I say that from experience (being somewhat on the ADHD spectrum myself) - that there are no limits to how many of these you can use; or at least that's how it feels to me (sorry!).
Usually by my third edit I’m ready to send. Of course, by then I’ve begun to question if anyone is interested in my option anyway and why am I sending this email? They probably know all this already and I’m too stupid to have realized it.