look...me too, i think an accoustic guitar would be better. i guess that is the way most of us started and it really helps you develop a good habit in finger position and strengthens your finger muscles. however, you don't necessarily have to get a teacher... I and a lot others have learned on our own and we didn't have any problem. It's only a matter of exercise and of dedication. It's also very important that you practice every day, even better than practicing two hours once a week. For example I have made myself a habit of practicing ten minutes before I go to sleep. I have downloaded exercises from the internet, printed them, and every day, as a "ritual" of finishing my day I do them. It's a really good exercise and at the end of each week I practise very much, about 5 hours a day both days of the weekend. From weekend to weekend I can notice the improvement. I only play songs on weekends or when I have more free time, as a reward for my achievements... I think it's a really good technique and a lot others have confirmed. so either you get a teacher or not, practicing even 5-10 minutes a day is a must and is a major boost.
good luck!