35 M looking for a health insurance

Hi, I am looking for a health insurance. This is the first time that I am going for it dont judge as I had noone to guide. Generally office proved the general health insurance. But wot the new startup company they dint provide these.

Also please guide about the existing condition will insurance covers that. ?

And I am looking for a health check up to if somecan guide what tests needs to done

Thank you so much 🙏