I am new to bitcoin core and C++

I downloaded already the project from: https://github.com/bitcoin/bitcoin and run "makefile" command. now I can make all transaction against the blockchain.

I want to have the option to run "getnewaddress" in the command line and it will stop in a break point in the source code. but i cann't run the commands "bitcoind" and "getnewaddress", without first building the project.

How can I debug this project?