So i fired it up again last night, and i'm back to grooving on it
Managed to build the bridge ...... kinda user error ..... the writing on the icon on the screen for the Structure Menu was so small i didn't realise it said 'Options'. Thought it was like every other menu where you held down Square. I had to YouTube it, and there was a note on the corner of the vid saying "Hold 'Options' to bring up Structure Menu" - d'oh!! Anyway..... was cool to get that done.
I then proceeded down to the south-west port and tackled the first boss. Died once, then managed to nail it. Other players throwing me grenades to use was a nice touch. Quite impressed with myself over that, considering i'm on Normal (almost thought of chopping down to Easy or Very Easy - may still have to do that later on, lol).
I've hit Episode 3 now, and unlocked Fast Travel, which should make it a bit easier. Having a bike to hoon around on is also making it a bit easier. Figured out how to skip the cutscenes you've seen 1000 times too. Yeah i know, but i'm used to games where a button pops up saying "Hold X to skip" or similar.
So yeah, i think it's clicked with me now