To start creating your own text - based interactive fiction, first, you need to have a clear idea of the story you want to tell. Decide on the setting, characters, and the overall plot. Then, you can start writing out the basic structure in a text editor.
Next, you should think about how to incorporate interactivity. This could be through choices that the player makes. For example, if it's a mystery story, the player might choose which clue to follow. You also need to consider how the choices will affect the outcome of the story. There are some tools available like Twine that can help you with creating interactive elements more easily. It has a simple interface and doesn't require a lot of programming knowledge. You can use it to link different parts of your story based on the player's choices.
Another important aspect is testing. Once you have a basic version of your game, get some friends or beta testers to play it. They can give you feedback on things like the clarity of the story, the interestingness of the choices, and if there are any glitches in the gameplay. Based on this feedback, you can then refine and improve your text - based interactive fiction.