I agree with previous answers. R is free, popular and open source. You can easely find exemple of data analysis and graphical representation of your data.
Currently about 13 000 statistical packages are available and more importently 36 taskviews. The Rstudio environment provide user friendly interface...
It is also worth mentioning julia (https://docs.julialang.org/en/v1/stdlib/Statistics/index.html) or GNU octave which is the open source version of Matlab...
It is also worth to have a look at https://www.predictiveanalyticstoday.com/top-free-statistical-software/...