I’m not a doctor but most smokers I know are pretty skinny. I personally dont get the munchies but I do get thirsty. It just depends on what you smoke too. Like, sativa high THC strains will give you energy, and make you active and ready to do stuff. People use that for depression. Indica strains have terpenes and higher CBD which are more relaxing. Then there are hybrids.
But everyone is a bit different and every strain is different.
But yes, as far as edibles, I dont even recommend those if you’ve never used marijuana. Too easy to eat too much. And very few people like being extremely high.
It’s all about finding what works for you and starting slow. Wait 2 hours before taking or smoking more. Research CBD, THC sativa vs indica etc. Leafly is a good website as well.
Me personally high CBD with small < 3% THC is what helps me.