Creating extra content doesn't have to be anything difficult, and you don't even have to create anything new in the beginning until you find your style. If you're creating conversational podcasts, you can cut out an interesting 10-minute passage that won't be missing from the conversation and add it as extra content. If you're creating a script, you can record parts that weren't used in the episode and add them as extra content in Toldo. If you're commenting on news in different areas, you can keep a few as extra content. It's important to be consistent, and in the beginning, one bonus "part" per week is enough.
In the episode, you then mention that there's bonus content on Toldo that they can listen to when they support your podcast. It's perfectly okay to communicate that to listeners, and it's perfectly okay to share the ambition that you want to make a living off the podcast. Your listeners will be happy to help you with it if you give them bonus content in return.
In the beginning, there are a multitude of ways to make extra content effortless. Gradually, you'll learn how to improve your bonus content and your income will grow. Later on, that income will potentially allow you to dedicate yourself to the podcast full-time and you can create more bonus content. The more bonus content you create, the bigger the desire to become your supporter will rise in your listener. You can also add different opinion videos, news from your life, or news from the future of the podcast to the bonus section that would get in the way of the main theme of the podcast.
Of course, you also need to focus on free content, so that listeners have the motivation to use Toldo even without being your supporters. Toldo can become the "social network" of your podcast, where listeners will come just because of you and the opportunity to learn more about you and the chance to interact with you. So it's a good idea to divide the content you add into free and premium. The ratio is up to you, but it would definitely be a good idea to give at least 50% of the content free. Links to videos or to articles, photos and things that were mentioned in the episode are perfect examples of a free content.