A strong foundation in algebra is deemed sufficient for self-studying calculus, with many contributors affirming that good algebra skills are essential for success in calculus. While it is possible to teach oneself calculus, having a professor's guidance can enhance understanding, particularly with complex concepts. Recommendations for textbooks include James Stewart's, which is user-friendly and commonly used in community colleges, and Ron Larson's, which is utilized at the contributor's institution. Basic trigonometry and intermediate algebra knowledge are also highlighted as important prerequisites for studying calculus. The discussion emphasizes that while precalculus may seem less critical, it solidifies understanding of functions and limits, which are foundational for calculus. Contributors share personal experiences, noting that self-teaching can be challenging but rewarding, especially for those motivated to understand the material deeply. Overall, the consensus is that with determination and the right resources, self-studying calculus is achievable and beneficial for future mathematical applications.