I know, through experience, that learning an instrument requires a lot of patience and commitment. This should come from both parents/ guardians and the musician. It is important to work together to get the best out of learning an instrument. I recommend that parents sit in on their child's lessons and take notes: my mum did this with me, for many years, until I felt able to take in all the information for myself.  It takes a lot of patience, as a musician, to not get frustrated when things appear to advance slowly; don't worry it will all come together with time, and suddenly there will be a moment where you realise you can do something on the instrument that you couldn't do before - this sense of achievement is definitely worth waiting for! 

I found that finding out more about famous cellists around the world and listening to cello music helped me learn the cello: I became more interested in playing it myself. Try and go to one concert every month if possible, it doesn't have to be cello music but listening to live classical musicians will inspire you to learn. This may be up to parents to arrange and organise, but it is definitely worth doing.

I hope this has helped.