Blockchain Expert in Arbitrium Required

Can you do this?

Please check the Testnet Link
https://testnetnfts.myherbx.com/

Mainnet
https://nfts.myherbx.com/
(Will be updated once testnet testing is completed and approved by client)

All NFTs are priced in USD. Users can pay with Arbi Eth and Arbi.

Need testnet contract for https://testnetnfts.myherbx.com/
After testing well, need mainnet contract.

Some features of the contract.
1. Able to mint after the relevant payment made using Arbi Eth or Arbi.
2. Sell the NFT in opensea.
3. The company earns 10% when the minter sells the NFT in opensea.

For Reference

https://bridge.arbitrum.io/

* Arbitrum One
* Arbitrum Nova
* Arbitrum Goerli

My questions are
1. Can you write the relevant smart contract from scratch?
2. If Yes, how long?
3. Can you provide instructions to my developer to integrate the smart contract you wrote to the present website? I will provide web source to check. The smart contract should work with the present MERN website.

Please bid. Answer me in message.