I have questions about the trips of Chinese travelling from China's Guangzhou are to California.?

What were the backgrounds of the people who made the trips to California? How much was the cost of the trip? What kinds of ships were used? What kinds of conditions for the passengers on the trip across the Pacific Ocean? Any thing on the web for more information?

I got 286,000 hits in Google for the three words
chinese migration california
That should keep you busy. Your public library will almost certainly have books about it, if you live in California. Ask a librarian to help you. They do it for a living and they are good at it.

I will try to help you from keyword perspective. I can see you are interested in Cantonese immigration to CA. You can try to use:

Cantonese
Chouzhou
Canton
Gold Rush

hope this helpful.