What you read, kylaxi, is mostly true:
- drybrushing is a popular technique because it's easy to teach.
BUT
it's easy to teach the basics only. learning how, when and for what effects to use it WELL takes time and experience. it's not a super technique. it allows to get your miniatures colored fast, it allows to achieve some effects difficult to achieve in other ways, but it's not a secret weapon that will immediately make your minis awesome.
- sometimes you need to take a step back to return to the right track.
YES, there is no failure, only attempt.
NO, there are attempts that are failures,
BUT only if you allow them
if you learn from failed attempt, you gain a hige benefit - experience. this experience is enriched by one additional piece of information: "this didn't work, choose another path".
think about it as walking through a labirynth or a city you don't know.
you check the paths one after another and mark them "not this way". eventually you remain with only the right way. maybe even before trying them all.
but if you don't mark those "wrong ways" you may keep repeating your mistakes.
in this case you fail, you lose time and gain nothing from it
but if you learn a lesson from failed attempts, they're not failures but experience.
clear?
and just like sometimes you need to stop and realize it's a wrong way, you need to move back to the last crossroads and take a different path,
the same applies to painting - if you see you're going in a wrong direction, turn back, return to the last point you were right, and choose a different route from there.
clear?
- now your choice of colors is a problem, yes. these colors don't really look good together. of course, it is possible that someone puts such clothes on, so you can paint a model this way. just don't expect people to like it.
NOW
sit for a moment and think:
- what do you think is your strongest point in miniature painting now?
- what do you feel is your weakest point now?
- what do you think needs improving first?
- what is difficult to you and you need guidance with?
you can let us know what you think about it
MY SUGGESTION would be to do an exercise in NEAT and SIMPLE painting:
- take a simple miniature. details are not necessary yet
- apply FLAT colors on it, just pay attention to neat painting
- NO blending at this point, no drybrushing - flat block painting
- you can add BLACKLINING to this
show us the results
Click to see full-sized image
Click to see full-sized image
Click to see full-sized image
) - actualy all impresive works base on light / shadow contrast just with added colors 
)
Click to see full-sized image