Those are not my recordings but I thought I could share my experience with you. I have been with Ben for about a year and half and he has been my only learning source.
If you play guitar, banjo seems like it should be easy. Less strings, less string tension, open tuning, what could be easier?
As you have found, it's pretty tough. For me the biggest challenge was my right hand picking.
I started with Ben's Section Rolls lesson. I just worked on that lesson for 7 or 10 days, trying to get to the point where my hands would sometimes follow my brain.
Then I did the Cripple Creek lesson which is pretty easy if you already play guitar (it's all hammer ons and open string pull offs). This song is great because it is pretty easy but makes the banjo sound like you think a banjo should sound. Very rewarding.
I practiced and still practice a lot. When I was learning, I practiced in just about all my spare time. At least a few hours a day, 7 days a week (I live alone which has many disadvantages but banjo practice time is one advantage). If you watch sports on TV, that is a excellent time to practice (because you don't really need to hear what's going on in a game!).
Be patient. It takes time but every day you get a little bit better. Every day that passes, the fingerpicks get a little bit more comfortable, your fingers learn more and more where they should go.