So, I just had posted a similar question on the forum today on how I can improve my MakerWorld models. Overall, as others have stated better pictures, titles and descriptions will make your model stand out. However, I do agree with RetroSharky that the models are not original, which if it isn’t absolutely better than the others it probably won’t do well.
I think its good that you started and your models are great, you just need to be patient with it. Eventually people will find these models if they stand out.