How can i get user's information and puts it in a nested array?

Question

just one by one...

Answer 1

If your question is about how you can input them in console the answer is by a single line or one after the other. For the single line, use the split function to split the values at a specific symbol like a white space.

After you got the input iterate over the array and assign the values.

For one by one just iterate through the input and assign it directly.