What Is Healthy Sexual Practice After Being Sexually Inactive For

What is healthy sexual practice after being sexually inactive for many years at age 60. I am worried it will be painful at this age. What should l do. I have a new partner who was widowed for 6 years and had another partner for 3 months. The vagina can be slightly dry not like it used to be and l am afraid of getting a sexually transmitted disease. How do l approach using a condom