The transaction ID on your purchase is the receipt. 

You do not need an NFT to buy the tokens.

We record our sessions as we have members in many different time zones.

Arbitrum network, more info here  https://docs.arbitrum.io/welcome/arbitrum-gentle-introduction

Only the NFT wallet can connect to the project. Only registered wallets will be able to purchase from the project. You might tell others, but they won’t have access.

Limited projects only need a limited amount of funds for their project, for example, 300k-500k, which would be a small allocation. Because of this, they are shown to the Level 5 NFT holders first. Premium projects are deemed premium when there is a high probability of a quick/high ROI. Standard projects are given to all NFT holders. Projects are sorted into these categories on a project-by-project basis.