These days it’s so easy to set up an email address that makes sense to have multiple email addresses for different reasons.
I’d definitely recommend using online email addresses and not limiting yourself to your internet provider. That way if you change providers you don’t have to:
a) change your email address or
b) notify everyone each time your email address changes.
c) you can access your email from anywhere.
However many email addresses you have – it’s easy enough to redirect or ‘forward’ them to just one place, so you’re not having to log in to different email systems. I have my personal and business email addresses redirecting to Outlook or Mac Mail.
Use your preferred mail system to be the central point to access your various email addresses.