There are no "techs" here. The responses you are getting are from your fellow users, who may have more experience with these matters than you do.
- Go to the page you want to be page 1. Go to the beginning of the first line.
- In the Page Layout Tab, choose breaks and insert a Next Page Section Break.
- Then go to the Insert tab and under page numbers, choose format page numbers.
- Tell it to start page numbering at 1.
- Go into your header or footer where you want the page number and tell Word to insert a page number at the current position.