I write this for all of you that visiting this post, not just for newbie or beginner.
Lets just straight to the point, you need at least 3 different email addresses.
1. For exchanges / social media account and any important account. Don't share this email to anyone else, please make sure that only you know this email. If someone knows this email address they will try to hack your account, even if you have 2fa on that exchange it will likely make your account lock, and if this your social media still probably fuck you up though.
2. For work/school. This means professional email, don't give it to anyone besides your college worker or friend from school.
3. For spam/promotional. You will use this email address for anything else, sign up for a newsletter, etc.

Why I wrote this post? Not long ago almost all my exchanges account got hacked, not really hacked tbh, just someone tries to reset a password something like that. and that because I use the same email for almost all my account and my email listed on my blog.
You also need to read this post by Ux PSA: DO NOT USE THE SAME PASSWORD FOR DIFFERENT SITES! and this by ONEnergy revealing e-mail might be dangerous

You can say that manage more than one email can be a hard job, so use this mail.com service you can create one main email address and add up to 10 more alias email addresses for free. That means you have 10 email address in one account. just remember don't use the main email for login to mail.com to any other sites, just use the aliases provided by them.