Very well done. I think you've captured her strong facial features very well and I particularly like how you emphasized her cheekbones. The look on the face is interesting - there is a shyness there but there is also a suggestion of good humour.
The composition is beautiful and you do manage to convey a shy creative person in your portrayal. I think it is a lovely portrait and I'm sure your friend appreciates the way you have captured her. Some people can be very inspirational which is ch a great quality.
I love the colors and tone used .This gives a kind of restraint in this creation. I don't know, if it's a choice on your part. But the disproportionate hand , symbolizes very well the vector of the creativity of your friend. Thank you Jane, for your work, it embellishes my days.