Starting self-study in calculus and physics requires careful consideration of the textbooks chosen and the sequence of learning. For those new to calculus, using Spivak's book may be challenging due to its rigorous, proof-oriented approach, which is better suited for students with prior exposure to calculus concepts. If this is the first encounter with calculus, it is advisable to study calculus for a month before beginning physics. "Calculus Made Easy" by Silvanus offers a more accessible introduction but lacks depth compared to standard textbooks, making it less suitable for a strong foundation in calculus needed for physics. Recommendations for better calculus textbooks include Stewart or Larson, which balance rigor and accessibility. For physics, Halliday and Resnick are criticized for their explanations, with suggestions to consider Gianacoli or Serway for clearer understanding. Self-studying calculus can be challenging, especially without a formal class structure, but it can be beneficial for those preparing for future academic pursuits.