Hello there! I'm have a lot experience with all what are you asking for! Even now, in this very moment I'm trying to start my own marketing agency (just baby steps, project really green).
I love how you look like someone with clear goals and KPI's. I would really glad to work with you. I have +4 year working with Google Ads, Facebook/Instagram Ads, Email Marketing, SEO copywriting, SEO, Graphic Design, and even WordPress Design using Divi Plugin.
Also, I can work with other marketing platforms as Mailchimp, Google Search Console, Bing Console, Bing Ads, Google Data Studio and Google Tag Manager. That's right! I can set up FB pixels and marketing/tracking pixels. I know how to set up basic and enhanced Google Analytics e-commerce tracking.
As you can see, I'm exactly what you're looking for and I would love to work with you and get all that experience building a new marketing agency. Also, I can work with several projects and campaigns in the same time. I like to work in the long term and in monthly payments, instead a hourly basis.
So, tell me if you need to know anything more. I'll be glad to answer any questions!