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Quick question: why? Why not choose to host a server in the US, near it's "costumer base"?
If you're doing it for the exercise, fine (though I think you'll find that cloud flare is pretty hands-off and you basically just click a few buttons).
If you're genuinely looking to improve cross-planet load times, I regret to inform you that a personal Lemmy instance is very much not a good target for this. A CDN works by hosting whatever parts of your site you can nearer to the people who will request them. For a huge company like discord, this means that when you upload an image to a server, they will sum up all users likely to load that image soon, find where they are and send a copy of that image nearby, saving on intercontinental traffic. They get to do this because they have many users, and they control the CDN (because they built it).
You on the other hand, are going to ask cloud flare nicely to do all of this for you. Since you aren't paying, cloud flare is going to try to do this automatically and without cooperation from your software. This means that cloud flare will basically only try to cache parts of Lemmy that are static, so really only the page layout and that's about it. Ultimately, the Lemmy website for your instance might load a little bit faster, but posts can't be predicted and so those will have to go cross-continental on a cache miss.
The other advantage this affords is that anyone interested in taking down your instance will have to take it up with cloud flare. If the way they're trying is brute force, they will fail where they would have succeeded against just your server. If their way of doing it is through legal threats, they might have better luck (though cloud flare tries to remove itself from a position where they have to police what their service can be used for, my opinion is that it is a matter of time before they are forced to).
Thank you for the wonderful comment!
The only reason I'm looking to host in Europe is because of the prices: this server will not allow for sign-ups (i.e. it will only be for me). I will likely only need 1GB of RAM and very little CPU power to get this to work. The prices in Europe for low-cost VPSes are better than in the US. I don't actually care about which country/continent I'm hosting it in, this decision was purely financial.
I have a question: I believe I can set Lemmy to auto-sync content from communities I'm interested in (I can set the frequency for the auto-sync) - would it be possible for Cloudflare to cache the content if it is already in the database of my Lemmy instance? I know that CDNs can only really cache static content but I do not know enough about CDNs/Cloud Networking in general to be able to figure out just what it would be able to cache.
Thank you, yes I had the protections offered by Cloudflare in mind when I asked this question. I do not plan to do anything illegal so I hope I'll be fine.
Could you also tell me why Cloudflare asks me to change the authoritative nameservers on my registrar's page to their nameservers? I think my networking is getting a bit rusty, I really can't figure it out.
One more thing; is there a difference in configuring a Cloudflare CDN vs a Cloudflare reverse-proxy for a VPS instance? I see people in c/homelab talk about this but I never really delved into it, but if I could access my network remotely using this it would a great bonus.
Thanks!
Hetzner (a popular European host) now has US locations and their pricing is really good. Look for hetzner.com - which is in English instead of hetzner.de, their native German site.