Swimming pool cleaning

Hi all

I have just purchased an IP with swimming pool. Unfortunately, the swimming pool has a thick layer of dirt and leaves at the bottom.

I am totally new to pool maintenance.

Though there is an electricity filter pump, I do not know if I can use the filter pump to clean the pool. I tried to run the pump for 1 hour but it did not much help.

Should I ask for a professional pool cleaner's help or use the water filter pump?

Any suggestions?

Photo of the pump

Swimming pool cleaning