I just created my own digital marketing company. I am attempting to find a niche and I am leaning towards email marketing. I am new to marketing and business and I am trying to learn all I can.
Hi @MTrelow, first I want to congratulate you on your new business venture 
On the other hand, since you are willing to learn all you can about this topic, I would like to provide some resources below that you should find helpful.
- Create and send marketing emails
- Edit marketing email content and design
- How to launch a successful email marketing campaign: Tips + data from an email marketer
- Run A/B tests for marketing emails
- Use personalization tokens
I hope this helps @MTrelow 
Best,
Diana