An alternative to Tableau is Microsoft Excel which is probably already on your computer. It quickly creates graphs and is a program that you are probably already comfortable with. Unfortunately, the graphical options in Excel have not changed significantly in the last few versions. So, the charts are starting to look a bit outdated. If you want a similar program to Tableau, then you might want to investigate Power BI. It is Microsoft’s Business Intelligence program and, just like Tableau, allows you to load data, use formulas to create additional columns, create visualizations, and upload them to the web. In addition to Tableau, you can also manipulate the data within Power BI by (for example) combining different datasets from a folder on your computer — and you can update the analysis just by clicking the Refresh button. In Tableau, you need to use Tableau Prep for such additional functionality.