There's a job posted that I'm planning to apply for.
Why are you going to apply for the job?
It's a perfect fit for my skills and the job description and benefits sound great.
This sounds like a good opportunity for you and you should apply. Make sure you've updated your resume and cover letter and submit your application soon.
I hope I'll get an interview, I'm not sure if I'm as qualified as others.
Make sure you stay positive and confident in yourself and your experience. Put forth your best effort and you'll be able to get any position that you want.