Hi there! It's good to see another Vietnamese student on here! I think you are on the right track. If you're planning to apply for Fall 2023, maybe try to get more research experience (the more research experience you have the better), and also study for the GRE, since some schools may not waive the GRE for students applying to Fall 2023 anymore.
Hello, I'm reapplying to Clinical Psych PhD this year as well (fall 2022). Would love to connect with you and people who are going through the same process!