Email deliverability is no secret. Just send an email to one of many email deliverability testers to find out the spammyness of your email: https://www.mail-tester.com

The sender IP address is a large component in determining email spammyness. This is why SES allows you to pay extra for a dedicated IP address (https://docs.aws.amazon.com/ses/latest/dg/dedicated-ip.html). However, it's not something you will likely need unless you send in large volumes.