Not much more difficult than it was in other times. Most people lived in the country and lived by farming, but this has been true of all societies until very recently. Much work was seasonal, following the farming year with ploughing, sowing, reaping, mowing, sheep shearing etc. Women usually took care of the poultry and the dairy, made butter and cheese, brewed ale, and spun wool and flax, preserved food for winter etc. and the whole family would help out during the harvest. Children would begin helping out with simple tasks from about the age of seven. Work was hard, especially in summer during harvest time. But there were holidays when people enjoyed themselves with music, dancing, sports and games. Christmas was the longest holiday, lasting from Christmas Day until Epiphany (6h January). There were many infectious diseases and people often died at a younger age than they do now - but again, that was the case up until the 20th century, it wasn't unique to the Middle Ages.