What is an entry-level consulting service a marketing newbie can offer to e-commerce companies to get my foot in the door and get started working?

I'm taking marketing courses and very interested in becoming a consultant someday, helping e-commerce companies with their marketing efforts. However I have little experience in it for now. I want to offer a service that will be low risk for a company to hire me to help them with. Perhaps copywriting for Facebook ads, or writing e-commerce email sequences, or writing product descriptions or managing Pinterest campaigns? Since Im not in the field yet and trying to break in, any suggestions on what I could offer that a client would say "Yes! We need you." I really don't care. I'll empty trash cans if it means I'll be an e-commerce consultant someday. thank you