that growth is very good indeed! But do expect it to taper off, sometimes dip, and not stay stable all the time. eventually you will grow large enough that you will have a steady growth, but at the start it can be quite unstable. Do not worry about your growth with a channel this new, just concentrate on the content, its the best way to grow!
as for sub numbers I would always show them. I get discouraged when i find a channel I like and they hide their sub numbers, sometimes I wonder if they are using illegal methods, or sub4sub and are ashamed of the number.
its also fun to find newer channels, so when they get big you can say "i remember subbing you before 1k"