Web 3.0 Blockchain Developer - Unity

Hello.

We have a website in Wix and we want to copy-paste it using MERN so we will do it Web 3.
We want to allow users to connect their wallet (MetaMask - Coinbase - Trust Wallet), and then
to be able to buy our token. Also to stake it and use it in our game. (Game is in the process of development). Also, we need to have our marketplace as well, inside the game environment).
Interested developers must provide their quote analytically, mentioning each development part
and timelines as follows:
Copy-Paste from Wix to Mern using React and node js
Implementing the 3 wallets
Allow users to buy the coin from the website (smart contract is ready and deployed in BSC)
Allow users to stake
Allow users to use the token in the game
Develop a marketplace in the game environment
Swapping in the gaming environment.
Implementing Unity model in the website.

At the same time, before any start of development, we want to implement MetaMask in the
current Wix website as well.

If you are the correct guy, let's chat!