Up 20-24 JPEGS for social media

I need approximately 20-24 JPEGS for social media postings (up to two per month) - mostly stock or in-house photos with logos and text embedded in them for Facebook, Linked In, and Instagram postings. You need to be able to source copyright free materials (mostly photos) off the webs to build up our image selections. We have an established in-house palette and a logo. You must be able to ensure that the art will display correctly across different platforms without crops or bleeds so as to be readable in all postings. Many will be extremely simple like: save the date: or Register now for early bird special, etc. I need someone who can speak English well with a fast turnaround.