Could I maintain my site on my own?

Yes, during the educational meeting at the end of Suzi’s Signature Webdesign Process, you will learn how to make important updates.
Your WordPress site needs to remain updated. An updated site is a healthy site. If plugins and theme files aren’t updated, your website is more susceptible to hacker and malware attacks.

However, if you don’t feel comfortable doing the maintenance, I have a maintenance service package that I’m happy to offer you.