Fiori Roadmap | 2022

Hello experts,

I am a beginner ABAPer. I want to start Fiori too.

I couldn't find a definitive roadmap for Fiori.

All articles say: html, css, javascript as prerequisites.

However, all these classes take at least 60 hours.

Are there any topics I need to know first for Fiori (callback on javascript, etc) or do I need to learn all of them?

If is there any topic list can you share the topic list and make some suggestions about learning fiori ?

Thank you for your valuable feedbacks.