Yes, as @Prisoner says it is possible. It is not what you asked - but have you seen these ways that Google provides to get skills published without requiring a lot of developer savvy?
https://developers.google.com/actions/content-actions/
https://developers.google.com/actions/templates/first-app
I don't speak for them, but IMO Google's target audience for Action building apart from the above is those who have at least some familiarity with the JavaScript language and its "run-time" Node.
There is also this - which I haven't tried by the way.
https://www.techadvisor.co.uk/how-to/digital-home/easy-actions-google-assistant-3665372/
In case it is not obvious, Google Actions are essentially websites that interact with Google's assistant running on a Home device or a smart phone, say. Think of the Assistant as a browser initiating requests and your Action as serving them. If you can (build and?) deploy a server that handles POSTS over HTTPS on a publicly addressable URL, and if you can understand the JSON payload that the Assistant sends and respond with appropriate JSON to carry out you application then you are good to go.
Where you don't have a public IP address - e.g. in testing - you can use a tool like ngrok ( https://ngrok.com/ ) to reverse proxy requests emanating from the Assistant to your server.
I have slides for a presentation I did targeting fledgling developers who had never built an Action here
https://docs.google.com/presentation/d/1lGxmoMDZLFSievf5phoQVmlp85ofWZ2LDjNnH6wx7UY/edit?usp=sharing
and the code that goes with it here
https://github.com/unclewill/parrot
On the upside the code is about as simple as it gets. On the downside it does almost nothing. In particular, it doesn't try to understand language. As @Prisoner says you'll likely need a tool like Dialog Flow for that.