Surrender does not mean lack of effort. That would be tamasic surrender and will not bring any result. It means now my life is meant for the Divine Mother. Hence think of the Mother, meditate upon Her writings and reject doubts as well as misuse of mental faculties.
It means also not to harbour anger, jealousy, fear, hate and try to love the divine element in everyone.
It means to turn your life into Her Service and to use the body only for Her purposes.
All this requires long time, great sincerity and persistent effort. One has to be very patient and full of faith. The sign that you are proceding in the right direction will be growth of inner peace, equanimity and joy.
Affectionately,
Alok Da