What are some ways on how to give back in Austin? 

https://artfromthestreets.org/
If you are looking for a unique way to volunteer in Austin, Tx look no further that Art From the Streets. AFTS is a free and open art studio for homeless artists. The art is for sale online or at the annual Show and Sell art show. Dozens of volunteers give up their time to make these events possible every year. They make a difference by allowing the artists to sell their work and keep 80% of the profit. When homeless artists create and sell art they gain much needed financial support and self esteem through the value of their work.