You could work thru one of the ML in R/python books e.g. Géron or Raschka/Mirjalili and then dig into the lin alg, prob, stats, calculus/analysis you see there

You could work thru one of the ML in R/python books e.g. Géron or Raschka/Mirjalili and then dig into the lin alg, prob, stats, calculus/analysis you see there with the books everybody recommends, LA by Axler, Strang or Proabilty by Bertsekas /Tsitsiklis, Real Analysis by Pugh, Abbott, Strichartz etc