You have described it so well that I can imagine it already:
I feel privileged to present you my proposal for your job. To start with, with experience of almost 5 years, I have been “designing” everything that is drawn in the minds of my clients, which is sometimes communicated effectively through words, or in the absence of that, my experience builds it. Ultimately, not to boast, but I get satisfied clients, which is the ultimate goal of my work. With hard work and dedication, honesty, and cooperation, I feel I am a fit for your job and would like to be given a chance.