I agree with the point above, collecting is a hobby. Don't treat it as investment. If you invest, it's stock trading.
Collecting this thing mainly depends on your personal preference. I feel like you, the poster, have a wide range of interests,
jades, calligraphy and painting, antiques, and porcelain.
I will introduce you to a place, go and check it out.
You can go to Bobo Art Network to have a look. They basically have everything you like.