i was 14 when i started to play, and i played clasic guitar for one year, so i had to practice a hour everyday, and i didnt enjoy it very much because i didnt like clasical music that much.
now when i look back i can say that this year was the most important year for me as a guitar player. even though i didnt learn many songs or theory i learned how to aproach the guitar, which is very important. so my advice is practice as much as you can, i think that practicing when you are a beginer is more important than practice when you are advanced player, because the basics that you learn and practice in the beginning are like a ladder which later will be the tool for you to go on, and to learn easily any style you'd like