I'm glad you have found my art and comments of use. Drawing is a skill and generally not as difficult as we initially think. It takes practice, of course, and time to get good, but with practice and the desire it can be done.
I mentioned cats as easy for two reasons. To me, they are not very hard because I do love them. But secondly, I have always found hair and fur to be intuitive to me and they don't present any problems. Most artists tend to find drawing hair very intimidating but in reality, it's just another texture that can be done reasonably using a few tricks. Again, it's just practice really.
This beard, for instance, took me about an hour to draw by using some techniques I worked out. I don't draw each hair but rather try to get the general texture correct.
Cats are indeed trickier because you have to take light into more consideration to shape their bone structure, the ambient lighting and try to make the texture look like you want to touch it. White fur, for instance, is rarely actually white - generally shades of gray due to shadows. But the technique is identical to beards or any hair, really.
Keep on practicing. It's the only way to get better.And spend a lot of time on the eyes. They are the windows to the soul and the key to a successful drawing - man or beast.