Hello World? Well, everyone seems to................
I would firmly endorse Saab's steps 1 and 2. After those you may choose not to try 3
All a 'computer programme' does is apply logic steps via a series of 1's and 0' to achieve a result. I would suggest you get to grips with Logic Flow Charts as a first step. There are thousands of links to learning these. Here is one. Follow GG's advice with a chosen simple 'programme' and then try a more complex one with a few 'Yes'/'No'/'If' loops etc.
Flowcharting