Check out this tutorial from Bodega workshop, hope it will help

Your problem is not clear from your question "how I chose a model". If you're asking "how do I run the software", the tutorial provided by Alice looks like the answer. If you're asking "how do I choose which model to use, what is the theoretical basis of the models, which is best" - well, that is something you should be learning as part of your course and you should talk to your advisor about it.