Hey, I'm also considering getting a master's degree in the same field in the future, though I took a break from studying and I now have 4 exams left until graduation so I'll have to finish that first.
I'm currently learning statistics on my own using this textbook: https://www.amazon.com/Introduction-Mathematical-Statistics-Its-Applications/dp/0134114213
Do you plan to use a textbook or do you prefer online courses? I haven't really managed to find any courses that seemed worth taking, but maybe I wasn't looking in the right places.