Adding a other e-mail account

Hi,

I recently received my MacBook Pro and I love it! Everything works out well and I don't come across any problems except my e-mail. I installed my "main" e-mail address which I need te most. But I want my school mail and my work mail also on the mail app. I searched across all of the internet, YouTube etc. but it seems that noting I find seems to work if I'm trying to add the two e-mail addresses.

I go to mail -> add account -> fill in my name and e-mail address en my password -> type account "IMAP" -> and then I have to fill in the server for incoming and outgoing e-mails. And that is the part where I get stuck. I really have NO idea what they want me to say there. I tried so many different things that I found on the internet but nothing seems to work and I have nu clue where I can find the right thing. Is there anyone that knows where I'm talking about and maybe can help me?

I'm sorry if some of my sentences are incorrect but I'm from the Netherlands and I haven't spoke much English lately, so I'm sorry haha!

I really hope someone can help me!