Violin, for example, is very difficult, but if you don't take the professional road, you don't need a high level, and you can play a lot of songs when you are working in your twenties. But the violin is also very noisy, especially for beginners.
Guitar, generally speaking, is usually a folk guitar. The future of guitar can only be the artistic path of classical guitar, and you are 14, which is unrealistic. If it is a folk guitar, I don't think there is any future. Those guitars on TV are played and sung by sound, and guitars are only auxiliary. So at this point, I recommend learning vocal music?
Why don't you learn wind music? People who like folk music can learn bamboo flute, which is very loud, but at least it won't be as noisy as playing stringed instruments. If you want to learn western music, I recommend learning clarinet. Its timbre is beautiful. And as far as wind music is concerned, the difficulty is definitely easier than strings and keyboards. The only problem may be that as a girl, your breath may be weak.