Jimy Hendrix, which I consider to be one of the best ever done it... a quote I found on-line:
“Sometimes you want to give up the guitar, you’ll hate the guitar. But if you stick with it, you’re gonna be rewarded.”
That's kind of encouraging right? Even the best wanted to give up on the guitar and had moments of hate towards it. So my thought: What can I expect from myself, being a dad of 2, playing perhaps 30-60 minutes a day?
You might have way more ambition than me. Then you need to play more :)
Don't be "motivated", be "disciplined".
"You find a lot of people these days who cannot stand to be alone. You could lock me up in solitary for weeks on end, and I'd keep myself amused."