If someone is experiencing doubts about their religious practices due to a lack of knowledge, they can:

1. **Seek Knowledge**: Study foundational Islamic teachings through the Qur’an, Hadith, and reputable Islamic resources to clarify doubts.

2. **Consult Scholars**: Reach out to knowledgeable scholars or local imams to ask questions and gain reliable guidance.

3. **Engage in Classes**: Attend classes, lectures, or online courses to deepen understanding of Islamic beliefs and practices.

4. **Reflect on Intentions**: Reaffirm their intentions and focus on the sincerity of their worship.

5. **Pray for Guidance**: Make dua, asking Allah for clarity and wisdom to strengthen their faith.

These steps can help resolve doubts and build a stronger foundation in understanding and practicing Islam.