What do you mean by
getting into data science and machine learning?
?
If you mean starting to (self-) study those things, then your regular school maths should be enough. If you ever need more than that, it will most probably be explained by your tutorial site or book. If it's not introduced, then you should be able to easily look it up. The internet is vast these days :)
See, when I started my technical engineering studies, I came from a regular school with no extra maths. I was taught Higher Mathematics and every thing else I need then and there. At the moment I am studying Applied IT Security and again, I did not learn any extra math beforehand, but everything I need is introduced or I can just look up stuff I forgot over the years.
So, it's really no big deal. Just start learning :)