You can't use a verb phrase as the subject directly, as you can in English, instead you need to substitute it with a pronoun (sé) in the basic sentence and then put the verb phrase in at the end, "it is Y X to do":
Tá sé deacair an leabhar sin a léamh (lit. "It is difficult that book to read").
Alternatively, if you want to put more emphasis on the difficulty, you could say:
Is deacair an rud é an leabhar sin a léamh (lit. "It is a difficult thing that book to read").
I'll let you have a go at your other examples yourself to see if you've got the hang of it.