I'm a UX designer, who is trying to make a note-taking app that can make voice notes, text notes and just notes in general. My only challenge with the no-code platforms is finding a component and not knowing what the 'action' is called to 'create a new something' Like create a new card with text. Create new voice notes etc. If there are free Api's for this that would be great. Alternatively, a youtube tutorial would be good.
With less expenditure there are plenty of coded apps on github. But if you want to learn how to code a simply note app, I suggest to watch this video for creating a "Note-App" and also this video for making a "Memo-App". After that you can implement function like voice messages, but start simple with Strings.