I have been trying to solve leet questions from couple of months. I am able to solve few, some I look at the answer and understand the algotrithm from solutions provided in discussions. I read about that algorithm, but later I am lost. Not sure if this is the right way to start. So I am planning to start some courses from udemy or youtube. Can someone help me with following questions:

1. I am comfortable with javascript/ typescript. Should I continue to solve leet code questions with same or should I switch to C++(as most of the online resources are in C or C++) ?
2. If I can continue with javascript, should I just look at courses for C++ to understand concepts and apply in javascript?
3. Couple of courses I have listed below:
   Mastering Data Structures & Algorithms using C and C++ by Abdul Bari (Udemy)
   Javascript algorithms and data structures masterclass by Colt Stele(Udemy)
   Data Structures and Algorithms - The Complete Masterclass by Vinoth Parthasarathy(Udemy)
   Which of these courses are recommended or any other course which has helped to get a step by step progression towards DS and algo?

Thank you!!