Making specific ai responses with assistants need help ASAP

Hey! Does anyone know to put a specific OpenAi assistant made on the OpenAI platform into my app?I figured out how to make AI work itself but I’m not sure how to make it the specific assistant that I created on the platform. Also, how do you add a component where the users can add photos that the AI can read, because on OpenAI that works but i’m not sure how to do it on thunkable. Thank you so much!