I too thought that the airplane was turning to the left for quite a while and its preety difficult to resist turning to the right to compensate.
This is quite a common sensation as is actually turning left. Dont know why
Concentrate on the instruments and if in doubt cross reference. If the D1 is steady compass is steady AH is level and turn and slip is also level believe the instruments.
Instrument flying can be the most challenging and satisfying form of flying.
What is difficult when you start instrument flying becomes second nature especially when you start to bring in other aircraft operation tasks to purely flying the instruments.
I always think of it as riding a bike or skiing. At one point you never think you will get the hang of it and then you end up riding your bike while reading a book (some do
I hope you continue even if you own a non IR aircraft as you never know when you will need those skills.
Pace