Thank you for your question. The major struggle in the way of Allah is the struggle of self-purification and freeing the self from the commands of the lower self. It is a long journey where the mind finds purity and connection with God. A person can strive with their life force to reach the lofty aims of purification and knowledge, and they can spend their wealth in order to achieve these aims through sponsoring humanitarian projects and helping those in need.
May you always be successful