Skill development

Hello everyone, I'm currently doing MCA and I need suggestions. Started learning Web Development & Android App development [a total newbie] and also exploring cyber security. Which field is in demand and would be better to get a decent job. Which tech stack should I learn for Web Development & Android app development. And what's the best way to know and practice cybersecurity? Also please share your learning experience in any of this field and resources you followed, it would be a great help for me. And any other suggestions are totally appreciated. Thank you.