Improving My Data Analytics Skills By Practicing On Datasets

Hello everyone, I would like to work on my Data analysis skills and am in the hunt for a few datasets that I could work on. I want to work on my Excel, SQL and Tableau skills. I would love to get hold of some datasets that start from extremely easy to an intermediate level so that I can improve my skills gradually. Any reccomendations on a data viz tool to use and anything else is highly appreciated too. Thank you!