The jailbreaking process has gotten WAY more complicated. You will have to get on CFW, spoof the current OFW, get file managers, etc etc.
You will most likely end up bricking your console. You can google NGU, go into their PS3 modding area as they have plenty of noob-friendly guides on how to jailbreak and all of that.
Or I suggest enlisting your PS3 on eBay as a 3.55 OFW console and putting up a reasonable price. After selling it, you can just buy a PS3 already pre-jailbroken with all the correct tools installed and etc. with the money you receive from selling your PS3.