Documentation for new users is difficult to follow

I've never used SQL, but I have a need to here, as I want to implement ts_tumble in BigQuery to reduce my data for graphing.

I tried following the user guide in Cloudshell Terminal, but I got stuck at:

user_name@cloudshell:~/cloud-console-sample-build (project_name)$ gcloud builds submit . --config=deploy.yaml --substitutions _BQ_LOCATION=US
ERROR: (gcloud.builds.submit) Unable to read file [deploy.yaml]: [Errno 2] No such file or directory: 'deploy.yaml'

I suspected it was because I hadn't cloned git to my project, so I ran:
git clone https://github.com/GoogleCloudPlatform/bigquery-utils.git

But got the same error for the deploy command, and still haven't figured out how to run the UDF in the SQL workspace.

Apologies for the broad issue, but perhaps more users could benefit from a documentation upgrade.

Thanks!