Confused on how to start?

I’m currently 18, and in my first year of university, I’m doing a maths degree and recently I’ve been researching actuarial science. The only thing is I’m very confused on how to start, people online recommend getting an internship, but is that possible with no prior experience? Most internships I’ve searched also require you to have your undergrad complete, so should I just wait until after I finish uni then??

I’m aware that the road to becoming an actuary is long, which is why I’d like to start as early as possible, so any advice on how I should start would be much appreciated!