Yes, there’s an existing Free version of Tableau called Tableau Public but you’ll have to make your data public. Tableau Desktop Professional lets you try it for free. Although it is for 15 days only. But if you are a student then you can get it for a year for free.
Tableau Public is a free service that lets anyone publish interactive data visualizations to the web. Visualizations that have been published to Tableau Public (“vizzes”) can be embedded into web pages and blogs, they can be shared via social media or email, and they can be made available for download to other users. Visualizations are created in the accompanying app Tableau Desktop Public Edition (or another Edition of Tableau Desktop) - no programming skills are required.
Tableau Public is for anyone interested in understanding data and sharing those findings as data visualizations with the world. Journalists, writers, bloggers, students, professors, hobbyists, critics, citizens and more. As soon as a workbook is published to Tableau Public, the viz is accessible by anyone on the internet
You can refer to the https://intellipaat.com/tableau-training/ as it will help you in preparing for a career as Software Developer, BI Professional, System, and IT Administrator. Most data Scientists appreciate the horsepower of Tableau Desktop paired with the Online or Server versions of the software. Also, you can take a look at this video too.