We like to use DocuSign for our digital agreements and legal binding signatures. DocuSign is the easiest to use but it is also a bit on the pricier side versus other options like HelloSign.
The steps we take for setting up a new DocuSign account are as follows:
1 - Create your agreement in Word or PDF editor exactly how you want it.
2 - Leave a couple spaces for payments details, signature, and date on the doc.
3 - Then create a 'Template' inside of DocuSign to speed up the process of creating and sending a new agreement out when a sale is made.
Once you go through this process. Practice using your template and send it a few times to yourself to test to see what the client will see. Make some tweaks as needed and when you go it looking real nice, you should be good to go!
Below is a sample agreement you can use to replace with your own business details to give you a head start on getting this part of your business up and going:
Download a sample agreement doc (might need to right click then 'save-as'):