if you're a natural worrier like me then you'll get overloaded, then eventually manage it.
i'm on navigation at the moment, and the many different things i now have to do in the exercises are getting slightly easier, but it still takes the instructor a while to iron out your mistakes or your priorities. it just comes together after a while and you're able to manage it when you're more organised.
if they have a go at you, then they are not the instructor for you. some people like that, others like a calm instructor, praise where it's due, telling you where you've made a mistake or missed something, but overall they give off a calmness that in turn makes you calm. then when it comes to solos you can handle everything just fine.