Scrape Google Jobs Data with simple API (Python + SerpApi)

Hi, I am attempting this but getting this error "module 'serpapi' has no attribute 'Client'". Am I missing something?

Any idea why my console would output JSON results with escape sequences?

How many results can be obtained for a single query?
"I am trying to scrape all the hotels in a particular city, but the retrieved results are limited to a small number, not exceeding 600. How can I overcome this limitation?"