How to start

Answer 1

If it concerns Java, here, complete the course.
Apart from that your question is a bit unclear.
Try to be more specific.

https://www.sololearn.com/Course/Java/?ref=app

Answer 2

do the java course

Answer 3

Thank you so much

Answer 4

https://www.sololearn.com/discuss/1589935/?ref=app

Answer 5

thank you