Would the person start learn from this who know nothing about java

Answer 1

Yes. Sololearn is good for beginners.

Answer 2

Strings are for words
Ints are for numbers

String x = "hello";

"String" << is kind of telling the system that theres going to be a word created...

"x" << is telling the system that x is going to be the symbol for the word.

"= " is telling the system that "x" is going to have a value

"hello" is telling the system that "x" has a value of "hello" so "x" now means "hello"

System.out.println(x);

//system output >>> hello

goes the same with ints i would practice these first :)