613 Jewish commandments?
That sounds quite demanding. How do you remember that many and how they apply to day to day life?
It is extremely hard to follow the 613 Jewish commandments. Jews have a Divine commandment to study them and to know all their details. This is why non-Jews are not obligated to convert. One cannot undo an Orthodox conversion. If a person sees that 613 commandments are too hard, he has no way of going back.