After installing Lotus, you can run the `lotus` command directly from your CLI to see usage documentation. Next, you can join the [Lotus Testnet](https://docs.lotu.sh/en+join-testnet).
If you seek a smaller network to test, you can join the `interopnet`. Please note that this network is meant for developers - it resets much more often, and is much smaller. To join this network, checkout the branch `interopnet` instead of `master` before building and installing;
```
git checkout interopnet
```
Please also note that this documentation (if viewed on the website) might not be up to date with the interopnet. For the latest documentation on the interopnet branch, see the [Lotus Documentation Interopnet Branch on GitHub](https://github.com/filecoin-project/lotus/tree/interopnet/documentation/en)