Pipeline to deploy a Python Lambda using serverless

Is there a step by step tutorial on how to deploy a Python Lambda via serverless using a Pipeline (or CodeBuild only for that matter) somewhere ?

I've gone through someones tutorial here: https://www.youtube.com/watch?v=aGI4Wlm5c9U but always seem to get stuck at the multiple IAM policies involved..

Just wondering if AWS has a step by step that i can follow.