I need help with seller financing documents

[Derrick Ziglar Jr]

I just recently spoke with a owner that is open to owner financing in VA. This is my first time and I was wondering if anyone is willing to share their purchasing contract and any calculators they use to calculate interest and payments. I want to provide the owner with a down payment next week and then provide her with a few payment plan options. I am definitely open to advice and any help with this. Thanks for your help in advance!