I looked at your “template” (technically an “ordinary” document). It shows a caricature of mechanical typewriter workflow (no offence intended), even by M$ Word standards. Absolutely everything is direct formatted (manual). There is even no use of DOCX styles for your headings.
Your best approach to convert it to ODF (Writer format) is to start from scratch because there is no formatting to salvage from it.
But, before starting this, read the excellent Bruce Byfield’s Designing with LO (you need to click on “More…” and scroll down a bit to access this book). It will explain what you’ll gain from styles. It is more clearly stated than in the Writer Guide (available from the same page).
If you want different layouts (page numbering or header/footer are elements of the layout) among your pages, you document must be composed of several “parts” (I use word “part” because “section” has a different technical meaning betwee Word and Writer). Each part is characterised by a page style (this concept does not exist in DOCX).
Therefore your first 10 pages will be controlled by a dedicated page style (or even perhaps several if you single out the cover). Built-in First Page is configured to switch automatically to Default Page Style on page crossing. Intended usage is either for the cover page (single use) followed by default pages; or for the first page of a chapter followed by running page in Default Page Style. It is up to you to decide which track you choose.
Even/odd pages are traditionally controlled by built-in Left Page and Right Page styles. They automatically alternate.
Transition between parts are done with a special page break inserted with Insert>More Breaks>Manual Break which allows you to select which page style is activated after the break and optionally a new starting page number. This transition can also be configured into Text Flow properties of a paragraph style so that it is automated. It is frequently done on Heading 1 applied to chapter headings, causing the chapter to start at top of a new page, without explicitly inserting a page break (because it is in the paragraph style configuration).
Generally speaking, Writer has 5 style categories:
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paragraph to define the geometric and text flow properties of a paragraph; it also provides a default character style for the paragraph
This is the sole category DOCX knows of. - character to apply typographical (visual) attributes to characters, different from the default in the paragraph style
- page for global page layout, header, footer and note configuration
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list: the name is misleading; it does not describe list formatting, it only controls the look of bullet or numbering
This type of style must be applied over a paragraph in addition to the paragraph style. It can also be associated to a paragraph style, so that numbering is automatic as soon as the paragraph style is applied. -
frame to control how images or side text annotations are positioned and interact with text
This latter category is extremely difficult to master but is a key factor for layout stability when you have pictures or side notes. You can leave it aside when starting to learn Writer but keep in mind you’d need it in sophisticated documents.
You’ll find also something called table “style” but they are not styles in the traditional sense. Preferentially, stay away from them unless you accept unconditionally the layout chosen by the developer.
One last word: your “template” has extension .docx, i.e. it is a “standard” document. When you open it, you must care not to overwrite it. As far as I can remember, Word had a special extension for templates, .dotm? Writer makes also a distinction between templates with extension .ott and documents .odt… When you open an .ott, it creates an untitled .odt. Thus even if you save out of muscle memory, your template is not overwritten.
To create a template, proceed as usual and in the end File>Templates>Save as Template. Do it only through this command: template internals are slightly different from ordinary documents; changing the extension is not enough.
