I always sin, what should I do?

You could do what Jesus did in strictly obeying the Laws of Moses , or you could satisfy the whole reason you have an ape-man body , ( which is to survive in order to reproduce ) by marrying some lady who is half as attractive as you . But , what really works is to make the sincere covenant with the Father to always obey all of Jesus' sayings ( Greek text ) no matter what ; And because 99.99999% of all Christians refuse to believe that it is necessary to sell all , and always turn the other cheek they will in some subtle form persecute you enough to make you have to rely of God's help , which He wont give unless you are doing what Jesus told you to do .