Sounds like you are kind of a move monkey. That's not a bad thing IMO.
What does that mean? Haha.
Learning moves that are difficult for me is part of what keeps me interested. I think it is great that you have an interest in Erdnase, it will serve you well in the long run.
How will it benefit me? If I can't apply most of the moves.
My suggestion for a guy who likes sleights is figure out the most common sleights you use in your magic and learn fancier, more deceptive, and yes more difficult versions of those sleights. This way you can keep challenging yourself with difficult moves and once those moves are mastered you can add them to the effects you already know get a good reaction. I'd start with the DL. There are a million varieties. Some meant to be fancy, others to look more natural, and some one handed. Once you find one you like stick with it to perfection. Find a good top card control, find a good bottom card control. Find a good in the hands false riffle shuffle and a few good false cuts. Not that Erdnase doesn't give us insight to this there is a lot of stuff that has come out in the last 100 years that is a bit better for a modern closeup magician. And while you are learning all this new stuff don't stop studying your Erdnase! Though I personally find it to be of historical and academic interest than practical it is still completely worth the effort.
Thank you, I will apply all of your advices, but why is worth the effort? When will I use everything that I learned? (Except for the false cuts/shuffles, and a few others).