What should I do so that I can learn Java in a fast and efficient manner?

I have completed some semesters in coding but got a big gap so in that time I didn’t do any practice. So I have bought some videos on Udemy and saved some in youtube so that I could start from scratch, I tried videos and other free websites such as code academy but it I am not getting a good grip and that what it makes me nervous and pissed every time. I am an overthinker and whenever I struggle with it I get really nervous. I need some hope and some descripted suggestions on it so that I can start again. Resources, tips, ideas, etc are appreciated.