[karlgrz]

One of the best pieces of advice I got when I started ages ago was to just put electric strings on the acoustic. If you're just practicing in your bedroom it will be much easier to play than on stiff acoustic strings. Give it a shot.

When you're ready to record then you can put acoustic strings on it, heh :-)

[grimoald]

Or use nylon strings for concert guitars.

[wyclif]

Or just use a nylon string, classical style or "Spanish" guitar for practice, even if you play something else in public. Nylon string guitars are easier on your fretting hand and allow you to practice longer without fatigue.