@nprofile1q... Another is the pen control you mentioned, you want to start with light pressure, then press a bit harder and finish lightly. This way you can blend your lines together rather than repeating the same line searching for the one you want to keep.
And last I'd say you should try for the most simple shape you can to construct your characters. You seem to try to draw long segments as one stroke and, unless you're really practiced doing this, it will make your characters look stiff.