somebody1, your cover letter is a bit weak. You need to grab the reader's attention and make him/her get to know you a little bit. Right now you just sound like you want to get out of there. So your cover letter needs to be a little longer.
Here's a basic structure for a cover letter you can follow:
Greeting (Dear ____)
Introduction - Give the reader a picture of yourself. This is what you have so far.
Show why you are a good fit for the position
Show why the employer is a good fit for you
Closing (Sincerely, etc.)
The "Show why" parts show that you've done research and are genuinely interested in the position, and that you're not just some job applicant spraying out generic applications.
Also, here are some suggestions for your text so far:
Keep in mind "show, don't tell". So don't just say you have skills with 2D and 3D art - say what skills they are. You have experience in other areas - which areas? "I am interested in this job because it sounds related to my skills" is weak. The "Show why" parts mentioned above will take care of that. "I am always looking forward to working hard and reaching new goals" - what goals? Be specific. Vagueness does you no good in the job application process.