Domain via Telegram? Isn't telegram a chat application? You could register a domain with your details at any provider and use their privacy whois protection service to hide your details from the public domain.
If you’re looking for a service to get a domain for your site, there are quite a few solid options. GoDaddy is one of the biggest domain registrars out there, and they offer a ton of different domain extensions. Namecheap is another good option; they’re affordable, easy to use, and have great customer support. Google Domains is simple and integrates well with all their other services, which can be nice if you’re already using things like Google Analytics or G Suite. Bluehost and HostGator are more known for web hosting, but they also offer domains, and you can often get a free domain for the first year if you sign up for hosting with them. DreamHost is another option that offers both hosting and domains with pretty good pricing and customer support. Lastly, Name.com is another solid choice that’s known for being easy to navigate and reliable. All of these services should have what you need, and many of them offer extras like privacy protection and email hosting, too.