George is correct basically.
Remember: you are going into training because, well, you need to be trained. Your first few months of internship have to do with learning good reflexes: that is learning to stay on top of how the patient is doing and figure out how to get through the day efficiently and what to do if something is going wrong. and by the way calling your senior is fine- that's what he's there for. You will continue to have lectures and bedside teaching. Attach yourself to good residents and learn from them (and attendings).
Having some fear starting july 1 is healthy: it makes you conscientious. however dont fret. Everyone knows youre a new intern and haven't done a lot. no one is entrusting you with things you can't do. Basically just be willing to learn and take on new responsibilities as ready. If you've a good attitude you'll do fine. Also, learn from experience anywhere- doctors, nurses, whoever.
steph

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Steph
If you get a warning, put on yer manpants and stop whining about it.