Ok now that we know how yissachar is supposed to be taken care of, what about the 11 other shevatim?
V’higisa bo yomam valayla, if you look it up in shulchan aruch, can be mekuyam through learning in the morning and again in the evening and still work at a physical job during the day. Of course torah should constantly be on one’s mind at all times.
I am not looking here to argue, just to make things clear ..