There are many more details and specific mechanisms that are not described in this short introduction, but it gives a good overview of the architecture and should help to get inside the code of the Massa Node.
Topics that were not handled here include:
operations fees (each operation provides a fee and block factories will tend to favor operations with the highest fees for inclusion in blocks first), and how they are shared between block producers and endorsers
ledger size limitation and the cost of storage
slashing and node banning
execution stack within smart contracts and what permissions smart contracts have in terms of ledger read/write access, based on their address
details about the opcodes of the Massa WASM virtual machine
analysis of potential attacks, like multistaking (when a block producer produces several blocks in the same slot)
For further references and technical details, you can find more information in the whitepaper.