NFT Smart Contract

I need an secure smart contract from an experienced developer so that i am able to list nft´s on opensea into a collection (max100 items) which I deploy over time. I sell them for a specific price or as an auction.
I could do that all directly in an Opensea collection, but the main reason for doing a contract
in my case is just that I need an own tokentracker-name. (see screenshot)
All other features are not really necessary but can be discussed to extend the contract!
I need to know then:
– what infos you need from me
– How I use the contract then to generate new items and make it visible on opensea!
– In the best case you send me the contract to deploy and guide me till my first item is
listed on opensea!

Thank you!