Thanks Mr C
I've created the illustrations (in Illustrator competitor Affinity Designer) and exported them to SVG.
It's the next stage I don't get; How do I view this illustration and amend in code? For example, in the basic tutorial video, the logo is already part of a webpage and is being changed.
If all I have is the SVGs, what do I do next? Add it to a webpage?
Don't forget, I'm coming at this from an illustrator's perspective, so be gentle.