HTML Email Design

Hi!
I'm a graphic designer and we were learnt how to design email designs/newsletters but not how to actually send them and implement them in real life. I'm trying to teach myself how to actually add it into an email and let it appear in Image format and not as code.
I've been able to create designs and I know how to slice various parts of the design in photoshop and add links to the sliced areas on the design.
I then export it as HTML. But apparently, I have to upload the image onto a server or something so that it can show on the email. Where do I get the server to upload it onto? And how do I go from there?
I'm hella confused. If there is a course or something I can take a look at, I would appreciate some referrals as well!

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Thanks guys here