I want to construct "I like learning, but learning from a book only can be boring": "Discere amo, sed discere a libro ipso sit taediosum."
I was wondering if you can omit "discere" in the second clause: "Discere amo, sed a libro ipso sit taediosum," "ego" being the subject of the first clause and "discere" the second. And also whether "a" can be also: "Discere amo, sed libro ipso sit taediosum."