Would this work as healthcare-seeking behaviors I am not sure if I am on the right track.

My healthcare-seeking behaviors include proper diet, exercising and having health insurance. These play an important role to maintain a healthy lifestyle. Proper eating habits and exercising will help to keep me healthy. Having health insurance will allow me to see a doctor and get the necessary treatment or preventaive care. will allow me to get the proper care needed.

Super!

Either choice for how you finish the last sentence is fine. Just check the spelling — https://www.merriam-webster.com/dictionary/preventive

Congrats!