how do i progress more on java after finishing the course

Answer 1

I would suggest making codes on the concepts you have learned then moving onto problem solving with code coach /HackerRank or any other site you prefer and then work on a project..

Answer 2

Do some sololearn challenges.

Answer 3

I Think you work on projects like -: calculator in Java, to-do list in Java
This helps allot to you and your problem solving skills are enhance by making a such projects.
All the best