1) get good at modding.
2) gain the respect/trust of other moddders
You need to earn the parts. there are alot of parts already out, make due with what is out until you earn the trust of the other modders. If I sound like an ass I apologize, however the constant infulx of new modders demanding the latest and greatest is really getting annoying.
Please don't call yourself a modeler if you're just going to take publicly available parts and throw them together on a model, its insulting to the actual modelers. A modeler is the person that actually makes those models you're using from scratch. In your case, you've done nothing besides import a few unlocked models without any textures whatsoever and you haven't even arranged the hierarchy properly. Persons who do and release such work are labelled by some in the community as a GAD(a person who just glues and distributes poorly assembled models), its not a term you want to stick.
You're learning and I respect that, I was there once too. However, if you're looking for decent feedback, the least you could do would be to get the model into the game(in a working state) and then start a thread with a few ingame pictures of what you've done or what you're trying to achieve. I should also make mention that many people don't understand the concept of using the forums and in turn they upload these models to the downloads database expecting feedback, an act that results in more hate rather than criticism nowadays as the downloads database has been plagued by such content over the past few years.
I'd recommend you take a look at the tutorials pertaining to the assembly of mods before you continue, doing so ought to be to your own benefit. Unless there's a demand for what you're making, I'd also suggest you keep the models that you've assembled whilst in the process of learning to yourself and rather use them for feedback in order to improve your skills.
Whilst many people aren't accepting of blunt responses and see them negatively, I'd rather be honest about what you've produced rather than praising it and giving you a false idea of success and perfection.
I think there needs to be an age limit to join on here...18+ this is one of the most immature forums ive ever been in granted ive only been a part of few truck forums but since grand theft auto iv is rated m for mature this site should also go by that and then maybe there wouldn't be so much drama on here because that's all ive seen the past few years nothing but drama queens