Audit edx's Calculus sequence, taught by MIT. The courses are: Calculus 1A, 1B, 1C. You can watch MIT OCW's Linear Algebra course with Strang and/or enroll in: "Linear Algebra - Foundations to Frontiers" on edx. Use Khan academy for supplemental Calculus & Linear Algebra review. You can get Stewart's Calculus text and read through it/attempt the problem sets. Once you have a solid Calculus/Linear Algebra review you can take a look at: "Statistics 110: Probability" which is found free here: https://projects.iq.harvard.edu/stat110/home.