Java : Java Programming Masterclass for Software Developers : https://www.udemy.com/course/java-the-complete-java-developer-course/
Web Developement : Introduction to Web Development : https://www.coursera.org/learn/web-development
Machine learning : Machine Learning A-Z™: Hands-On Python & R In Data Science : https://www.udemy.com/course/machinelearning/
C++ : Beginning C++ Programming - From Beginner to Beyond : https://www.udemy.com/course/beginning-c-plus-plus-programming/