To copy and insert rows or columns in a matrix, you need to follow these steps:

1. Determine the row or column that you want to copy and insert.
2. Create a new row or column to insert by initializing an empty row or column of the appropriate size.
3. Copy the values from the original row or column into the new row or column.
4. Insert the new row or column into the appropriate position in the matrix.

Here is an example of how to copy and insert a row in a matrix:

Suppose we have a matrix A with dimensions (3,3) and we want to insert a new row after the first row. We can follow these steps:

1. Determine the row you want to copy and insert. In this case, it is the first row of matrix A.
2. Create a new row to insert by initializing an empty row of size 3. Let's call this new row B.
3. Copy the values from the first row of matrix A into row B. We can do this by using a for loop to iterate through each element in the first row of A and assign it to the corresponding element in row B.
4. Insert row B into matrix A after the first row by using the insert() method. This method takes two arguments: the index where the new row should be inserted, and the row itself. In this case, we can use the index 1 to insert the new row after the first row, and pass in row B as the second argument.

Here is the Python code to implement the above steps: 

import numpy as np

# initialize matrix A
A = np.array([[1, 2, 3], [4, 5, 6], [7, 8, 9]])

# determine the row to copy and insert
row_to_copy = A[0]

# create a new row to insert
new_row = np.empty([1, 3], dtype=int)

# copy values from row_to_copy into new_row
for i in range(3):
    new_row[0][i] = row_to_copy[i]

# insert new row into matrix A after the first row
A = np.insert(A, 1, new_row, axis=0)

# print the new matrix A
print(A)

Output: 

array([[1, 2, 3],
       [1, 2, 3],
       [4, 5, 6],
       [7, 8, 9]])

As you can see, the first row of matrix A has been copied and inserted after the original first row, resulting in a new matrix with four rows.