Monthly dynamics analysis

Hi everyone.
I need to analyze the monthly dynamics of the vegetation in a forest (the classes are: forest, mattoral, meadow, bare soil).
the images that I will use are sentinel 2 images on which I made corrections, and layer stacking in the SNAP software. (these images are free from clouds and cloud shadow, and each month of the year 2019 has an image)
please someone can tell me the steps i need to take to do this dynamics analysis and the software for this case.
and thank you cordially