Alright I presume you cannot access the PS store at the moment as you are on Demo mode. To fix that use a really simple fix:
Make a folder on the root of your flash drive called PS3. Than make folder inside of PS3 called UPDATE. Now inside update put my PS3UPDATE.PUP. Than put your ps3 in recovery mode. To do that hold the power button till your ps3 turns off, Than hold the power button till you hear 3 beeps and it will automatically turn off.
Than hold it again and let go after the third beep this time and it will be in recovery ! Your controller will need to be plugged in via USB cable. Choose update from flash drive and after the update applies you will be running firmware 4.21 with full access to PlayStation store etc. THIS IS NOT A JAILBREAK !!!
I did not write this .pup file I am merely passing it on so credit goes to the original creator.
Now in regards to Jailbreaking you won't be able to do that unless you get it downgraded. You can either get it done yourself(tricky) or you can get one of the kind members on this very forum to do it depending on where you live.