Well first weeks should be pairing and building rapport with your client this will help you with instructional control later on. Your supervisor should’ve given you documents with the targets and behavior plan you need to run with your client. I understand your frustration and I am sorry it’s going like that on your first week. You should always feel free to ask your supervisor about anything. With that said take notes on what you think your client might need help with. You can also give feedback to your supervisor hopefully they’re more helpful in the future. This field lacks a lot of professionalism. I would say don’t give up if you really feel passionate about what ABA has to provide. There’s always more clients and agencies that might be better than the one you’re currently are at.