Instagram Design Services

Hi there everyone 👋 I am Gus a graphic designer with experience working with startup in the past. My work mostly just producing content for their Instagram account. Promoting their products/services or a regular daily content to building their online presence. I am trying to do some freelance work right now, but I have 0 idea how to do it. So I figured that I might need to build my credibility and stack up some testimonials before I go out and offering my services. So, if anyone of you guys might need help to get some content running for you instagram account. Please let me know