First, it depends on what you mean by E-Sign. If you mean providing a laptop or tablet to the signer so the signer can sign documents that don't need to be notarized, there's a good chance you already have the hardware you need. Do you have a Windows 10 laptop and a spartphone that can act as a hotspot? For most esigning services, you're all set. A few have tried to get people use an electronic pen and a special pad, but those have been resisted, and I don't hear much about those anymore.
There are various providers like DocuSign, Pavaso, and Docverify, but the title company or signing service most likely would quickly get you set up for free, so no reason for you to subscribe to any of these.
If you mean the signer would esign a document that needs to be notarized, and then you would enotarize it, it depends on the laws and rules in your state. So far there has been very little of this going on for real estate signings, so I would suggest you wait and see what develops.
If you are interested in doing enotarizations for people who use a camera and microphone to communicate with you via the internet, instead of appearing in person, these seem to be mostly for general notary work. You would first have to find out if this is allowed in your state. If it is, you could check out the website of one of the companies in this business and see if they are looking for notaries in your state.