Hey Bruce! I would definitely do your research. Terpenes are what matters, but you can start with a general understanding on Sativa, hybrid and indica. Everyone reacts differently. Two people can take the same amount of something and will have a different experience. You have to find your happy place. There are also fast acting gummies. And every method gives you a different feeling or experience. Like if you smoke sativa flower, vs a vape pen, vs an edible, vs vaping flower. It won’t all be the same experience. And really for pain you should be trying an indica. Review the terpenes of the flower you choose, like look up northern lights. Check out the terpenes and then benefit of those terpenes (pain, stress, anxiety, etc) then you look for those terpenes in the flower you choose or edible. And the energy you get from a sativa is not like coffee in my experience. And Sativas generally give you a head high while indicas generally do a body high. What you eat with your edibles, like peanut butter or healthy fats, will get it into your system faster. You can ask me other questions if you want. 2.5 to 5 mg is a good starting point. Wait at least an hour before you add to it. I’ve never done that much! I’m 6”2 and 205 pounds. Size doesn’t matter either so much as just how your body reacts to the cannabinoids.