Hey, Welcome to psp3d

I have spent a bit of time away from the scene myself, but I think your best bet is to downgrade to 1.5, upgrade to custom firmware 3.40 OE-A, then upgrade to 3.52 M33-3, then from there upgrade to 3.80 M33-2, which is the latest firmware. You dont need DevHook to play homebrew when you have custom firmware.
The following page will tell you all you need to know:
http://psp3d.com/getting-started-hel...-same-psp.html