1. Assign your own keyboard shortcut to your styles: ToolsCustomizeKeyboard tab▸select a shorcut▸Category: unfold Styles, select a style▸click Modify
• at the end of a paragraph, type the first letter of the new paragraph in the same paragraph (so before pressing Enter)
• go Left (left arrow) then Enter then End, continue new paragraph... A little tricky but with practice it can be fast (I would however recommend the first solution)