You're filling out an application for some job. What job? That's the position you are applying for.
AS you are applying for the position, not me, only you can answer this.
What are your reasons and goals for this position
In an interview, you may be asked the reason for applying to the position. State that you have had an interest in this type of work for a long time.
Describe how your experience, qualifications and competencies match the position for which you are applying
If you apply for a job and get the interview you may be asked to give a reason for applying to this position. You could say that you admire the company..
My personal past, professional experiences are my own and would have no relevance or benefit to YOU in applying for a position. When applying for a position YOU need to relate YOUR past, professional experiences, not someone elses.
You should think about and be prepared to discuss what it is about the position that appeals to you. You should demonstrate to the employer your passion and motivation for the type of work for which you are applying.
Do some homework first so you know something about the company and also about the position you're applying for.
This means to tell what you have done (your experience) that matches the description (requirements) of the job (position) that you are applying for.
An application or interviewer may ask why you are applying for the position of a package handler. Tell them you like to perform this type of work and the company is a good location from your residence.