I'm bad at words, so this is all I'll say. Leona top is the same idea as Maokai, a cc heavy tank that doesn't die. The doesn't die part is the most important. Even if you're losing in lane, the amount of base armor you get from your W and runes makes you tanky as hell. However, you don't want to overestimate this and get cocky. Give your lane partner enough respect that they don't get a huge lead and you should be fine. That's it, I can't think of anything else. This is my first guide so go easy.