I guess this is what I meant about it being "foreign".
I have learned quite a lot in a short period of time.
But learning it isn't the same as being in the habit of doing it.
I'm a "lefty". All of my life it was okay to do anything with my left hand.
In Islam, I need to eat and drink with my right hand (something new or "foreign").
I now have the knowledge, but it will take a long time before it ever becomes habit and normal for me.
That's the breakdown between knowledge and doing for a lot of things.
I've almost mastered the drinking, I still slip occasionally.
The eating part, I start out intending to eat with my right, but most of the time I subconsciously switch to my left and don't catch it.
(It would probably be a little amusing watching me attempt to eat this way. I feel like a baby without the ability to master a knife and fork. :) )
So I've accumulated the knowledge about more than a few rules and practices. Now I have to make them become a normal habit, which in a sense involves overwriting some previous habits.
Forming an intention to do something is not difficult, remembering to make the proper reference to Allah ta'ala is.
That's pretty much what I meant about there being many rules and practices that are foreign to me. (Brand new, never even had the knowledge before.)