Overlay New Text On Photo

!!! I DON'T WORK WITH PROVIDER WHO SEND ME ANSWER CREATED by AI !!!!
Only answer to provider who read in person, thanks



1, replacing TEXT on middle of picture WITH NEW TEXT
a, existing watermark cover up with with GRAY COLOR / full cover up /
b, NEW TEXT OWER "GRAY COLOR" in dark black color: F O R S A L E
I need to be able change size, depending my equipment image, I posted smaller and larger image size.
b1, Or using free program ERASER

2, RED COLOR PAPER WITH NUMBER ON IT:
I need to cover up with NEW SAME SIZE PAPER WITH GREEN CHECK MARK.
I need to be able change size, depending my equipment image, I posted smaller and larger image size.

!!!!!!!!!!!!!!!!!!
YOUR JOB DESCRIPTION:
Give me detailed info with screen shot how I will do it myself.
YOUR WORK IS TO TEACH ME STEP BY STEP by using any FREE SOFTWARE, like CANVA, PHOTOESCAPE X.
ONLY design software that is FREE, no subscription, NO 30 days trial.

!!PLEASE REEED PROJECT, YOU HAVE ANY QUESTION, ASK ME.

PROJECT COST IS FIXED $20 / so save you a time, if this is not good, just take a walk, thanks