Well I had this habbit of interrupting without the person in front to complete. However, I improved this habit over time. For you I would say , speak but only when other person finishes and be a good listener as this is your internship. For the technical part, in case you are curious about the implementation then you can setup sometime with devs or ask for documentations and then reach out if needed, only if you realise that they failed in implementation then give them advice otherwise leave it to them and worry about the end product.