NFT Project, assist with contract creation and listing (Opensea)

Job ID: 33480486

Budget: $8 – $15 AUD

I have a collection of NFT's that I need help in creating on Opensea (minting). Process needs to be able ot be tested on Rinkeby first.

I have tested some of the behavior on Rinkeby and have been able to upload and mint using NFT Port but am limited due to the size of the collection and cannot find a way to list particular items for sale. ie to be able to list items 100-150 for sale.

Requirements
Assist in creating Smart Contract
Provide process and steps for me to mint NFTS (Visual Studio Code)
Provide process and steps to list part of collection for sale
Provide process and steps for them to be hidden until sold
Provide process and steps for others to be revealed while not sold
Needs to be on Polygon but tested on Rinkeby first

Images and json files will be on IPFS
Hidden Image and Hidden metadata will also be on IPFS.

I have some experience but require support in getting things finalized.

Thank you!