I would highly recommend starting w/ OpenRouter - it's easy to play around w/ free models and their documentation is great.

OpenRouter Quickstart: https://openrouter.ai/docs/quickstart

See usage example here (Typescript): https://github.com/brownrw8/olelo-honua/blob/main/src/provid...

And while you're at it, check out my open source project using OpenRouter, ʻŌlelo Honua ;)

ʻŌlelo Honua: https://www.olelohonua.com