Search function, put in fishing jervis bay, there is everything you need to know including fishing spots and general areas, you can launch in the river near the park or pending on the park there is a ramp at the a park up the river, but your looking at a long ride to the heads, best to proble get up early and drive through to murrays ramp I think it's called, which is at the heads proble much safer,
I have the same boat, but mine says 4.94m boat massive difference haha, with anew 90etec.
Have a read through the forum or google, there is loads of info out there which, show different spots for all fishing, snapper, flathead, Kings ect
I'm staying crook haven for 3 night end of the month then back a week later for a week, I'll be fishing different spots, jb from calla to the heads, currarong out round the cliff or off crook haven , if weather is no good the up greenwell point.