Create a Brand Style Guide and Logo Refresh

We need a style guide that includes specific colors, fonts, and other graphic design elements in formats we can use in print and digital. We're looking for a volunteer who's excited about our mission and has experience with brand and voice. This is a highly visible project that will impact us for a long time! This style guide may also include the following:
-Rules and guidelines for staff and board members to maintain brand consistency
-Tone and voice guidelines and examples
-Formatting examples
-Grammar, spelling, and punctuation preferences
-Instructions for utilizing the brand style guide based on communications channel or stakeholder
-The value of a consistent brand and voice

Working with a volunteer will let me know if our message is clear, if our mantra can be recognized through our logo and if the message moves anyone who reads it. I need everything to be simple but dense. Piquing interest but not overwhelming participants.

We'll share our branding goals and our target audiences. Our team will also come prepared with examples of brands we like. We'll share some of our past marketing materials. During the interview process, we'll ask to see your portfolio and examples of your graphic designs. We already have a logo that we've been using, but we would like to revamp it; it will be very similar.