Is giving money as charity to da'wah projects sufficient as a substitute for fulfilling the duty of calling to Allah for someone who suffers from extreme shyness?

The Sharia encourages Muslims to exert their utmost effort in supporting and inviting others to the religion, using various means such as advising, delivering lectures, teaching, writing, conducting research, raising children Islamically, and adhering to the religion to serve as an example. Da'wah (inviting to Islam) through conduct is more impactful than words, and spending money alone is not sufficient except for the incapable. The most important areas of spending are raising children and maintaining kinship ties, alongside the permissibility of assisting in da'wah projects.