VBA macro - Two buttons per section that copy down a row or delete current row

Complete newb here.

I am looking for some very simple (I would think) macros. Each section of a proposed invoice will have at least one row of data, basic formulas or a data validation dropdown (first column). What I need is two buttons (area shown in black). One button would add a new row to a section (like the row below the title...in the first case row 2). The other button would delete the current row. It would also be very cool if the first time I clicked the "add" button it would unhide the section title and the first row (rows 1 and 2), then subsequently just add rows of data copying the first row of data down. I guess it would also be nice once all the data rows have been deleted if it would hide the section (range) again.

I have attached the very basic Invoice_Guts.xlsx for example.

Thanks in advance!

not sure i quite get it, could you add a tab with the desired outcome-i think it's easy to accomplish but i can't quite visualize what you are asking, pm me when you've done it so i can help you out