It is not that simple my friend. there is no standard way to hack a website. there although some simple tools that are more likely to find vulnerabilities on wordpress. Check wpscan for example. If you wan't to learn hacking you must know at least one programming language and how internet works (modem/router/lan/wan/ethernet etc...)
Oh. I forgot to mention that automated tools such as wpscan/nessus/openvas etc can find only known vulnerabilities. This means that if the site is upgraded to the most recent version (which means that all known vulns are closed) you won't be able to find anything. That is the main reason you need to learn programming and how the things work, you need it to find new vulnerabilities that are not known to automated programs.