This question really depends on you. What pieces are in your repertoire?
What technical aspects do you have trouble with - if you find playing arpeggios difficult, this may be quite difficult.
It's a really personal thing, some concert pianists may find it difficult, while on the other hand, there are 10 year olds that can confidently perform it.
I think 144 is a tad too fast, again, some may prefer it slower, and some may prefer faster.
I'd recommend you to play more Chopin etudes before this, I think Op 25/1 is a good start.