Hi Iris,
I recommend using an online spell checker like grammarly.com. The premium version with the paid subscription offers more flexibility and suggestions besides the basic grammar correction. However, the free version also works well for beginners and intermediate English learners.
By the way, your writing has a problem with the parallel structure. Following is my recommendation for the revision.
Hello, I am looking for an English native speaker and hoping to practice my English. My (spoken) English is at the intermediate level, and I can communicate well with others. Also, I can teach you Chinese (if you are interested).
I hope that clears up some doubts—best wishes on your English learning journey.