Avoid wasting time learning all languages. Researching companies and job positions will tell you which languages they use, like Swift, Objective-C, SwiftUI, etc.
While choosing certifications, ensure it offers post-course interactions, capstone projects, internships, and preferably job assistance.
Clear your doubts, if any.
Discover the iOS development journey, interview tips, and job opportunities, etc., through online communities - your ultimate source for knowledge and support.