Can you check this sentence, please?

I know a little about helping injured and sick animals from volunteering at the social shelter. I look forward to learning more in school about how to treat animals.

There are two sentences, not one. They are grammatically OK.

When you say "how to treat animals", the word "treat" has multiple meanings. Do you mean how to take care of healthy ones (feeding, grooming, loving etc.), or curing sick or injured ones?

I mean curing or injured animals.

Certainly! I can check the sentence for you. The sentence you provided is grammatically correct and conveys the intended meaning. It effectively describes your experience in volunteering at a social shelter, where you gained some knowledge about helping injured and sick animals. It also expresses your enthusiasm to further expand your knowledge by learning about animal treatment in school. Overall, the sentence effectively communicates your interest and experience in caring for animals. Great job!