You can register .ro domains and every Romanian extension (.com.ro, .info.ro, .org.ro, .store.ro and more), plus international ones such as .com, .net, .org, .e...
A CNAME record makes one DNS name an alias of another. It normally cannot coexist with A, AAAA, MX or TXT records for exactly the same name. For example, you should not keep both a CNAME and an A record for www.example.ro.
Before deleting existing records, check which services depend on them. A standard CNAME is not suitable for the root domain because mandatory DNS records also exist there. Some DNS services offer alternatives such as ALIAS or ANAME, but their availability and behaviour vary. Ask the service you are connecting for instructions compatible with your DNS provider.