Don't underestimate the importance of a Style Guide! It's a document that you put together that demonstrates the fonts, colors, writing style, image style, etc that represent your brand.
Its purpose is to maintain visual consistency across your website, social media profiles, emails and marketing material which helps customers immediately recognize your business. Strong branding suggests reliability and longevity to your customers which is the key to establishing trust.
Use the options on the Theme page to find a combination of design styles that work with your brand. You can use this as your Style Guide and update your other profiles to use the same styles.