I usually use the one at Kyeema if fishing the bay but there is nothing wrong with the ramp at Foreshore Drive. Be aware that plenty of cars have gone for a swim sliding in at low tide though.
Just take your time don’t feel pressured and start to develop a checklist.
If you can’t reverse practice somewhere else first.
Be prepared before you arrive.
Stop in the prep area. Make sure the bungs are in. Tie down straps are off the back. Motor is off the travel bracket. Rope is ready depending which system you are using. Or have one of you in the boat. Leave the safety chain and winch on!
Reverse back in your lane with the boat in at the right depth that takes a bit of practice but for me the step part of the trailer mud guards are below the water and there is just s little bit of ramp at the back of the car out of the water. Handbrake on and park or in gear. If it’s night time ( not on your first attempt) turn your headlights off there is nothing worse than trying to reverse when other people have their headlights on.
Undo the safety chain, I’d usually have the person in the boat lower the motor and start it at this point. Or they can hold the rope if not in the boat most likely standing on the pontoon. Release the winch and give it a push off. Don’t forget to take the winch handle back off if it’s removable.
Jump back in the car and go and park it. Check it’s locked, nothing on display lights off. If possible the person looking after the boat should have moved it further up the pontoon or hang back out out of the way and just nudge up to it to pick you up when you arrive on the pontoon.
The fun is out on the water so don’t hang around at the ramp making a nuisance of yourself. If you are struggling accept some help and do the same for others.