I'm at a point in my life where I need to devote myself entirely to guitar
Advice from an old fart, discard at will.
- You never "need" to devote yourself entirely to anything. Life is what it can be due to the multitudes of emotions, experiences and directions it allows for. To go for one at the expense of all others can lead to success they will tell you. Usually also leads to a monochromatic type of life, where you missed out on the entire forest. Both valid choices, but.. no one "needs" to exclude everything but one.
- You most certainly never, ever, "need" to devote yourself to a musical instrument unless you have the experience, age and wisdom to grasp what lacking money really means. Not now, no no.. what lacking money really means when you're in your 40s and 50s. Trust you me, it's a glorious brand new experience. That you'd best do without. Unless you know, really know, that you're something special.
Wanting to devote time and effort is O.K, ambition's a good thing. "Needing".. speaks of other things.
- Leading at us to the final bit, "i am now at a point in my life". Maybe i'm overreading this, but i smell youth! Which is awesome mind you

If so, go nuts about it, but remember that some doors, you only close once. Invest your time wisely ^^
(you also don't need to ignore the old fart, i'll shut up now)
Best of luck to you ^^