Need Help with Excel VB, Button that add certain Data the data has Main Heading and Sub-h

[Moelesjones89]

Good Day Guys

I need help with a VB Excel, I added two button the other one its an ADD button and the other is Delete Button, The Add Button adds Code-Commodity and its Unit,M1-M10, Code-Commodity should be Main heading that has sub heading M1-M10(Milestones) under like my spreedsheet. The spreedsheet should be automatic and clear without data, the data should be inserted by clicking the buttons and I am struggling with it, can you please assist me. I have attached the document....

[Moelesjones89]

Please I need assistence (Help) with this template as I am not familiar with Excel VB......