A few tips:
οὐ γὰρ περὶ τοῦ ἐπιτυχόντος ὁ λόγος, ἀλλὰ περὶ τοῦ ὅντινα τρόπον χρὴ ζῆν.
The second clause has an articular infinitive, which is object of the preposition περὶ: περὶ τοῦ ... ζῆν "about living..."
An indefinite relative clause subordinate to the infinitive comes between it and the article: ...ὅντινα τρόπον χρὴ... "...in whatever manner [one] must..." (ὅντινα τρόπον seems to be accusative of respect, and ἐστί is implied, as per usual, with χρὴ)
Ὦ παῖ, γένοιο πατρὸς εὐτυχέστερος.
πατρὸς is genitive of comparison.