@JosephY Can I suggest you look at some easier places to get your experience up;
Snowdens beach - it's in the Port River, head south from the boat ramp, lots of salmon trout at times, a few bream, fish the edges and around the structure. Don't go NE towards Torrens Island in a big tide change, it really moves a lot of water past the marina over that way.
Garden Island - launch at the boat ramp area. On big tide swings the current screams through the Angas Channel, but if you hug the mangroves you'll be ok.
Seacliff - launch in front of the Surf Lifesaving Club, head towards the