The documentation is almost useless. The examples in there are very basic and not helpful at all. The docs might be enough for building basic blocks such as a pricing table, but not for more advanced blocks that need to show dynamic data. Crucial functions for developing dynamic blocks (a basic feature for client work) such as getEntityRecords/getEntityRecord are an afterthought in the docs. There is just one example with them and it still uses higher-order components instead of the much simpler React hooks. If it weren't for StackOverflow, I wouldn't have gotten very far building blocks.