Not all TLDs (gTLDs, ccTLDs) are available at all registrars, so I use a mixture of NameSilo, Porkbun and Zone.eu (zone.ee same thing). Zone.eu/.ee is like “the Porkbun of EU” (kinda, not really) and they have some of the cheapest registrations for EU ccTLDs. If a ccTLD requires proof of identity if you’re a foreigner, Zone accepts a verified PayPal account as sufficient documentation.
Welcome. If you’re not aware, BlueSky is seeded by venture capital money and is generally under the ownership of billionaires; their “federation” is you optionally running a server that hosts your own (meta)data but the access to use that data (your content feed) still goes through one and only one website owned, operated and moderated by billionaires. They’ve already made it well known they intend on adding ads to their platform and have not yet worked out actual server federation. $0.02