Share your work if you feel comfortable doing so. Seeking and accepting constructive feedback (反馈) is crucial to growth. I post my work on social media and, in turn, have met some of the kindest people. They make me feel valued and respected, no matter my level of artistic ability.

上面的内容摘自2023年高考英语新全国卷2的阅读七选五。

请问，句中的feel comfortable doing sth 是句型吗？

里面的 doing 可以换成 to do 吗？