I would like to become a good Libreoffice Calc user. How should I learn to use it, as I don't have any real business cases to solve but I would like to learn those? I have studied a good skills on Python and a very basics of R. I don't want to spend money more than 100 € for learning.
It's a bit hard to answer since you have no stated goal, so we need to speak in generalities. To learn LibreOffice Calc, you can:
- Explore the interface and familiarize yourself with the different features and tools, like entering data, creating formulas, formatting cells, creating charts, filtering and sorting, and pivot tables.
- Read through official documentation and user guides.
- There are plenty of tutorials available on the LibreOffice website and on YouTube.
- Create some practice projects for yourself. Here are some challenges you might consider: https://ryanstutorials.net/programming-challenges/spreadsheet-challenges.php or https://en.wikiversity.org/wiki/Spreadsheets/Spreadsheet_challenges