It's not necessarily that Latin is difficult, just that at times it's SLOW. Essentially I've got three declensions and two conjugations down, I can mechanically give the forms and the like, however reading Latin can be painfully slow at times. I'm using Wheelock's mainly, my plan of study is this:
Read chapter
Comprehend chapter
Practice using the vocabulary
Do the tests
move onto next chapter
However, as I said, the reading itself is slow (is this natural at first?) and vocab retention is precarious at best.
Yet there are times when I absolutely love Latin, when something finally clicks, when I can point to objects and name them, or make questions out of them.
I use my cats to demonstrate! although Feles magnam mensam portat, is hard to act out...but still

Q: Nigrane Feles est?
A: Etiam domine, feles nigra est.
or
Q: Albusne Feles est?
A: Mineme, domina, feles nigra est.
etc, right? (I've spent some times with Adler's

Also that's another thing, Latin sentence structure. I understand the basics (SOV) but composing some of the sentences Wheelock asks for can be such a task.
Right I think that's about it, it nowhere matches the passioned invective I had in mind, but still I can update later I guess.
:S