The smallest working example I could make of some basic interactions with an already set up fabric network.

https://hyperledger-fabric.readthedocs.io/en/release-1.4/build_network.html

1. Start up the default first-network.
2. Start with querying the ledger by go run query-ledger/main.go. It should pick up the first-network.yaml in this directory and print out the basic details of the blockchain.

I currently interact mainly with the fabric-chaincode-evm, which is a go chaincode that has a nice invoke that takes only one argument. This makes a very easy testcase for me, so you will have to adapt to the default chaincode for first-network.

Beyond querying the ledger, there is an example for interacting with chaincode in query-chaincode/, along with a program that interacts with both the ledger and the chaincode in one run in query-both/.