You seem to have relatively good brush control and all the colours are all where they should be, with nice clean lines. There is some nice blending going on as well. I think you have done an all round nice job with this mini, and it looks pretty cool... The base is a really quality job !!
So if you just want to keep your painting at a good table top quality then your definitely on the right track and just carry on doing what your doing.. but if you want to improve your skills then it’s exactly as the points Zab has mentioned. Just keep painting and pushing your skills... my biggest advice is to stop dry brushing all together (at this point in time) !!!! It is a good technique and very effective in the right application, but the same effect can be achieved with other more advanced techniques and results in a much better looking mini.. Just try to resist the temptation to get that quick finish with dry brushing and work on blending techniques to achieve nice smooth colour transitions...
you can always start a work in progress on here as there are so many people here to help and offer good advice... as well as scouring YouTube etc as there are so many great videos showing how to perform different techniques...