I have a hard time keeping my knuckle on the third finger bent when playing, in order to have correct hand position. For example, when playing ascending triads, it starts out bent, but when I switch positions, it straightens out.
One thing I have attributed to this is that this finger must be “double jointed.” My teacher recommended I only bend the second knuckle on this finger when I play, rather than the two, so its a straight shape, rather than a rounded one. However, I tried doing this and my finger remained bent, but the first knuckle was bent almost backwards when I tried to keep it straight, because of the force from the string when I placed. This was quite uncomfortable, so I can’t keep practicing like this.
Do you have any tips on keeping the fingers bent correctly when playing?