Hello Nick,
There are several ways you can prepare for the course but first I recommend you look at the requirements for applying, i.e. what would you need to submit for the intake and other criteria such as Language Requirements, as this is an International course there is a certain level of English required.
You can find more information here: https://www.saxion.edu/programmes/bachelor/creative-media-and-game-technologies/requirements
Also I recommend taking a look at course content and what to expect over the years and as for 3D Modeling that is a course that is currently offered in the first year.
Again, in terms of application/preparation (in showcasing your portfolio) - I recommend if you do have 3D models to include them in your portfolio.
I hope this answers your question, if you have any other concerns or need any other advice we are here to help.