This is in the works for the big rewrite of the Editor we are currently working on.
In the meantime, one thing you can do is use Marked, a separate app for previewing Markdown from any app on your Mac. It's a separate purchase, but it's a good app from a good dev.
If you don't want to pay a subscription and want a non-proprietary note format (so that you can change notes software at any time) then your best bet is to use Markdown and a compatible editor.
I use iaWriter on Mac, iPad & iPhone. The notes are stored on my iCloud drive and sync automatically whenever a change is made. You can also keep notes locally on any device (outside of iCloud drive) or on any other cloud service. I could also use apps like Ulysses or even Visual Studio Code to edit the files, and Marked to format them nicely (although iaWriter does that as well).
I've tried Evernote, OneNote and Bear before now, but they all have some limitations and are all proprietary formats (which I'm not keen on). The above setup I've found to be perfect for my needs.
I would suggest LaTeXiT for equations. As a heads-up if you're using an M1 Mac and install LaTeX through homebrew, you need to locate the gs and pdf2ps linked binaries in /opt/homebrew/bin
as it won't find them.
I don't think Bear works great for notes with equations, due to readability/editing issues, but it depends on your workflow. MD preview in Marked2 is good and you can set your style if you're publishing to the web, that way you can preview it well.
Also depends how many equations you have and how easily you switch between apps but to me it's a huge pain with physics notes, so I gave up trying. LaTeXiT is highly recommended however for equations in all kinds of apps.
There is no need to be embarrassed, but since you are and clearly want to behave differently about it, learn how to test/preview locally before committing.
I use Marked ( https://marked2app.com/ ) in GitHub mode for previewing Markdown documents. If you don’t use MacOS I’m sure there is a similar app out there you can use.
Don’t rely on pushing to test, test locally and the process goes faster.
Use it alongside (Marked 2)[https://marked2app.com], which will monitor and refresh a preview of your markdown file (or clipboard) as you're going. Lets you select from several built-in themes, plus you can download more, and create your own (if you want to).
You can achieve the desired pagination on a Mac, if you purchase Marked 2 - https://marked2app.com. You can go to the Note menu in Bear and choose Preview in Marked and then in Marked 2 choose File ->Export->Save as PDF (Paginated). In your note you just need to insert: <div style="page-break-after: always; visibility: hidden"></div> at the appropriate place. You can set this up as a shortcut key in System Preferences-> Keyboard->Text so that it can be entered quickly.
Marked 2 is only $13.99 and is an amazing program, doing far more than described here and with any other Markdown app as well. It’s better to buy it from the website rather than the App Store as Apple introduce some sandbox limitations. The developer is very helpful and will allow you to transfer to a download version from the website if you do buy from the App Store (like I did) and find it too limiting. Hope this helps :-)
If you’re on Mac and using Marked there actually is. Just open the note in Marked and raise/lower it with ⌘+/⌘- and it will reflect on the printed page. You can even get the styling of Bear
On macOS I use Marked 2 and this vimrc snippet:
function! PreviewMarkdown()
if exists('b:preview_status')
return
endif
if filereadable("/Applications/Marked 2.app/Contents/Info.plist")
let l:preview_cmd = "open \"marked://open?file=" . expand("%:p") . "\""
"echo l:preview_cmd
let presult = system(l:preview_cmd)
let b:preview_status = "true"
endif
endfunction
if has('autocmd')
augroup md
au!
au BufWritePost *.md call PreviewMarkdown()
augroup END
endif