Here I give you unique answers that can polish your skills in reading and finding sport psychology journals:
1. Find an English textbook about sport psychology, read one by one the reference. There you will be find some sport psychology journals.
2. Find an expert of sport psychology in your country, prefereable who are working in university; type his/her name in google scholar, pick one article, there you will find a sport psychology journal. You can find alot more by Reading the article reference
3. Just type one random name of author you find no 1 or no 2, put it in Google scholar or research gate, you will find their article in a sport psychology journal.
4. Of course, you can also find sport psychology journals in Google scholar, SPORTDiscus, Human kinetics, scimagi, elsevier etc. Explore and have fun!