Help creating a Solana Smart-Contract

I need to create a Smart-Contract that saves information about products in the Solana Blockchain. The products must have different attributes and they might mutate in the future. Apart from that I also need to add other elements to the Blockchain that reference the previous ones.

I just need some guidance with the project and be shown some examples of how to do things because I'm new with Solana so I guess this can be resolved by chatting.