For maps, you'd drag the images you want on the map layer, for text, create handouts and load them with that text, create characters for your npcs and pcs, etc. I'm afraid without knowing much about the game, I can't really make specific recommendations. If you haven't gone through the tutorial yet, I'd definitely suggestion giving it a go: <a href="https://app.roll20.net/editor/tutorial/" rel="nofollow">https://app.roll20.net/editor/tutorial/</a>