Changing Fonts In Open Office

three white ceramic pots with green leaf plants near open notebook with click pen on top

"I've googled several times now how to make a certain font my default in Open Office.  Directions I've gotten often list names that aren't even there, but I went through what I thought I needed to do, and time and again, when I want to type a document/letter, it reverts back to the old font.  How do I make it stick to the font I want?"