Hi there,
Although I am very new to the freelancer program, I am a experienced internet writer (proof available) and very committed. I already use 6 of the social media platforms you listed below, so I have some background knowledge, but I fully understand that research will be required to make the articles informative and correct. I am a creative person and am sure I could integrate infographics as you have mentioned in the job description.
I can assure you that if I am hired, my work will be to the highest quality and will be error free. I always price reasonably and am very flexible in this department. Moreover, I can turn around work extremely quickly and would embrace the challenge of long term work. So long as I am given 2 days to complete an article, I would be open to as much work as possible.
I am very excited by the prospect of working with you, and would very much value and appreciate an opportunity to work with you.
Thank you for my consideration.