Formulas are one of the most powerful Airtable features. If you want to get into formulas, this article is a great place to start: https://www.softr.io/learn/airtable/10-most-used-airtable-formulas
It's an overview of the 10 most used Airtable formulas along with practical examples. After reading it, you'll be able to apply those in your projects as well.