I recently started learning how to play, im using Yousician and the current lesson is to be able to play individual strings with a finger on each fret. everytime i pluck a string while holding right next to the fret, it doesnt make the right sound. sometimes it does, but it usually just makes a twanging sound that doesnt count according to the app and doesnt sound right either. ive tried holding my finger at certain angles, plucking from different angles, but it doesnt really make a difference. i tried with and without a pick, and holding my finger on the string lightly and hard. the guitar has been tuned and i dont have much experience with any of this.