Hi there - noob question as I’m just starting out and working out what is useful to buy...
I thought I might have a go with copper first to learn soldering skills (plus I quite like the colour). I’ve seen various discussions about using silver solder and then hiding it with decoration or gold to blend in. I’ve also seen an Etsy store that sells copper solder (I think in the US).
I can get 1mm copper solder wire on eBay that claims to be ‘ideal for hobbies & jewellery making’ but I noticed that Cookson Gold don’t list copper solder in their own clearly more specialist catalogue. And that makes me think that perhaps there is something more I need to know about using copper.

So folks, what do I need to know?
Thanks