If you're releasing something so people can see what will be coming, then you are better off making the itch post without linking a file. The best way to ensure mods aren't broken are finding more sets of eyes to test work. It didn't take modding knowledge for me to notice that almost all the wheels are not aligned to the axle, then drive it into a field to find none of the spacings are set up as advertised. If you release it right the first time, good chances are you never need to update it.
Also, trust me when I say that age is not a factor in making a mod good or bad. I've seen grown men share mods that lack any quality or polish, and there are high schoolers and college student that have already proven to be some of the best modders in the community. I'm not even two years out of high school myself. It all comes down to experience and training yourself to have a sharp eye for things that don't look right.
From what I can tell, you didn't ask permission from the modders who made the work you're editing either. Doing that is a quick way to make bad relationships with other people in the community, and if you talk to modders and get permission to use their stuff, they may even be able to help you with issues you come across, depending on the person.
Sometimes it is also good to just make edits and enjoy them yourself. A lot of people in the community, including myself, have done edits for personal use and just exercise skills in the process. The best releases are the ones with thought and time, like how my early releases were conversions of equipment we didn't yet have in 22 because they could fill a need, not mods we already had with sound and wheel swaps.