Hi @NoyraSana welcome to the community!
The way to think of DNS names with ENS is that it’s not a “transfer” of the DNS to ENS. ENS doesn’t become the registrar or anything of your .biz name. More accurately, it’s an import of the DNS name into the ENS protocol so that your .biz name can be used within web3/blockchain. In other words, DNS names are forward compatible with ENS.
Your DNS name will continue to exist in web2. In otherwords, whatever records you setup with the DNS Registrar (GoDaddy, NameCheap, etc) will still functionally work in the DNS/web2 world.
No, the DNS isn’t transferred to ENS. It is imported into ENS to gain blockchain/web3 functionality. For example, once yourwebsite.biz is imported into ENS, your .biz name can receive crypto in the same way sending to yourwebsite.eth resolves to your Ethereum wallet address.
There are no registration fees to use a DNS name imported into ENS. There are also no expiration dates. It does cost a fair bit of gas to do the import currently, but that’s just gas to interact with the Ethereum blockchain. In the near future DNS import will not cost gas to do using CCIP-read and wildcard resolution. https://twitter.com/nicksdjohnson/status/1473410189919338498
The support team can help guide you with the DNS import. You’ll need to make sure your DNS Registrar supports DNSSEC.
If you do need help, feel free to dm the ENS Twitter account: https://twitter.com/ensdomains
Or, visit the #create-a-ticket channel in the ENS Discord: https://chat.ens.domains
Hope that helps!