It's a good idea to start preparing yourself now.

I'd like to make a few suggestions.

Because actuarial science is all about math and statistics, you should study math thoroughly.

Keep statistics and probability out of your way. Don't think that they are easy chapters so why bother with them, instead study them thoroughly and practise as much as you can keep doing research about the course, learn about the subjects you have to study there keep your mind clear about it and dont doubt it for a second because it is one of the best profession and if you are good at maths and have an interest in it then you are doing the right thing know the ways through which you can pursue it and find the ideal way for you to be successful

Best wishes!