A tip for dubbing bodies - less dubbing is better. Also, try to taper the dubbing on the thread, so that when you wind it onto the hook, it comes out as a tapered body. For tying such small dry flies - you barely need any dubbing on the thread, a whisper will work. Might not look like much on the thread, but as it's wrapped on the hook, it really builds up quick.
And once you get to adding wings - if you don't want to mess with hackle tip wings - white, gray, brown, or black polypropylene yarn makes great wing material, and it adds floatation to the fly.