I've posted before about how to have no page number on the first page. I used the approach of creating the page styles you used. This time I'm just going to show you how to do it using existing page styles, which takes a little of the complexity out.
(There are two easier ways, but with those ways, you lose the formatting if you save the document in .doc Word format, then close and reopen. This one works when you save in Word format.)
First: Choose Tools > Options > Writer > Printing. Turn OFF the "Print automatically inserted blank pages" option. This inserts an even page between two odds. It shows up in print preview. Don't worry about it; just turn it off unless you are doing books.
Now: How to have no page number on the first page, and have the page number on the second page start with either 1, or 2.
1. Create or open your document.
2. Type the content you want on the first page. You don't have to do it all, but let's say you've got some there.
3. Choose Format > Styles and Formatting.
4. Click the indicated Page Styles icon, fourth from the left.
7. Choose Insert > Manual Break.
8. Select Default as the style that you want to switch to, in the dropdown list.
That's the basics. You now have one page style applied to the first page and a different one applied to the second page. You can modify one without changing the other.
11. Choose Insert > Footer > Default.
12. You now have a footer in the Default page style (second page and subsequent pages) where you can insert a page number.
13. Click in the footer and choose Insert > Fields > Page Number.
14. The page number appears. Format it as desired, center it, add the word "page" in front of it, or any other changes you want. The page number doesn't appear on the first page.
You now have one page style applied to the first page and a different one applied to the second page, with different formatting and footer contents applied to each.