I use a heavy Indica strain. Very very heavy. Usually knocks out anyone who tries. It is medical grade. Have been using medically for years. Well before it was legalized.
Marijuana affects people differently. So you do have to watch if you are a beginner. Start with a Sativa strain. Low dose, then a hybrid if you like. Or a bit higher strain.
CBD is also great for main health related issues. There is tons of research out there but like any drug/medication, there can be side effects and learning your dosages for either medical o raises or just getting highs have to be done slowly for a newbie.