How much weed?

I know this is gonna sound weird, but I don’t smoke joints and blunts much, I mostly use carts just because of the convenience. I was wondering how much bud I should smoke? I been using carts for about 6 months couple times a week. Tolerance is like medium. Was going to buy 2 half gram j’s and an eighth, is that enough? Was planning to smoke one or two of the j’s while fishing then whatever is left over I smoke with friends.