After four months of working on my art every day I'm not sure how to improve now. It Would be great to get some advice.

The past four months I've improved a lot but now things have almost come to a standstill. I would be grateful if you wonderful people could give me some advice on my latest watercolour studies.

If anyone is interested here is the archive of every piece (whether silly or serious) i've worked on since August. Maybe it will motivate some of you to keep at it. Feel free to critique!