No. You do not need to create an account to start earning STORJ tokens by renting your drive space.
All you need to do is run the storagenode software and configure it properly.
Note that the V2 network is being deprecated as we are in the Beta Pioneer 1 stage of V3, so it is not recommended to start farming with new nodes on V2 now.
You can learn about how to sign up to become a Storage Node Operator on the V3 network here.