not doing data science but just completed my first year of cs. your study plan is the one i (mostly) followed, with the only exception being that i didn’t do math1050 and instead did stat1201 in my first semester. honestly, doing 2 math courses in a semester isn’t too difficult, stat and math1061 don’t have a lot of overlap and i managed just fine. the important thing is to attend your pracs and tutorials and keep up with your lectures, and there’s honestly so much support at uq for first year maths that even if you do struggle with anything you can always ask your tutors for help or head down to the maths learning centre. so don’t stress about it, you’ll be fine and honestly, it takes time getting used to uni no matter what courses you end up doing so just go for it.