The IFR is alot about your scan-rates...
...electro-mechanical instruments: your eyes should be scanning the core flight instruments in a "T" fashion...
...EFIS instruments: in a horizontal "----" fashion across one or two screens (there are many sorts of course).
As Chimbu mentioned, this scan info your eyes read, needs to be interpreted very quickly, like second nature, in the absense of an horizon.
When you are flying in cloud, YOU WILL GET THE LEANS
, as your ears are telling you one thing while your eyes can't confirm/adjust this "ear input" with an outside visual cue... hence, trust the instruments... ALWAYS... and fly through those strange feelings and vertigo.
We are creatures very reliant on basic visual cues and we take this for granted. We need to apply ourselves abit further when in IFR, in quickly reading/interpreting Instrument read outs correctly.
You should have much fun in the learning process.
Hopefully you keep the same amount of landings, to take offs
Happy Landings.