I also study architecture, and I think the answer of zhanghai200 10 seems to be biased towards civil engineering. If you want to turn to architectural design, you must first understand what architectural design is. Secondly, we should read more books on architectural design and communicate with architecture undergraduates. In addition, learn some necessary software, CAD, SU, PS.
In fact, it is also good to learn through the internet, so that you can gain perceptual knowledge and meet some friends. I recommend a website to you, which I personally think is good, that is, "Etuo Construction Network". Now that I think about it, it seems to suit you, hehe.
In addition, its slogan is:
Eto Building Network, the closest design network for architects in China!
I seem to be studying Southern Metropolis Daily.