Dear Li Ming,
To help you better prepared for university life, the following three suggestions are on the top of my list. First of all, it is advisable to make a detailed plan, during which process you can consult the experienced. What's more, a systematic accumulation of relevant knowledge on your major would prove essential to desirable results. Last but not least, it is high time that you found a good instructor who can give you timely support whenever you are in trouble.
I hope you will find the above-mentioned useful and practical. May all go well with you!
Zhang Wei