Did you forget to turn the auto-pilot on ? Gets me every time, that ...
Trust the wise words above. You're guaranteed to be trying too hard ... learn to trim, then wait ... don't chase the aircraft.
It'll sort itself out in time. Oh, and if there's a pilot out there who's not at least a little ring-rusty after a sizeable lay off, I'd be surprised ... I have lots of hours compared to you, but if I don't fly for extended periods it always takes me a little while to get "the feeling" back to instinctive levels !
Enjoy your course !