My english learning experience

Time flying flies, it seems to me that I was just admitted to the university, but actually , (no comma) it’s already the end of the semester, as we can see from the trees outside the window. It’s a quite different experience for me to study in the United States, and I’ve learned a lot of new things in these days, including in my dear Denise’s class. Although I’ve learned much in this semester, I know I have to learn more in the future.
On the one hand, definitely, I have to say I’ve made much progress in this communication class. At first, I learned how to write a proper email for different situations, which is quite important for me, because we don’t have much experience writing emails before in China while Americans use it frequently in daily life (Your tense does not match here. It should be either present tense: "we don't (do not) have much experience writing emails in China..." or past tense: "we didn't have much experience writing emails before in China...") . In addition, I refined my resume several times under your help, now I’ve already received some interview invitations, which is also significant for me, and I know I can’t do it without your dedication.
On the other hand, I know there’s more to learn as I learned more (this is awkward with both tense and where you placed the phrase. better would be (present tense):"as I learn more I know there's more to learn", or past tense: "as I learned more I knew there's more to learn" ). I feel that accent and intonation are difficulties for me, and I’m glad to spend more time in the future to practice my oral English, to do my best to speak naturally and to refine my accent. Also, I want to do more writing in the future. (or ;) I didn’t do much writing in this semester since we are from a math program, and we play with coding, algebra stuff every day. But I want to do some research in next semester, and I know it would will be important to for me to master some writing skills and do more writing practice. By next May, maybe I can finish my research, have a well-written research paper and deliver a fluent presentation.
All in all, I’m happy for with what accomplishments I’ve achieved now, and I will work harder to realize my goal for next semester. Finally, special thanks to dear Denise and your dedicated help.