Benni Newbie, as many others have suggested, here are some suggestions/tips:
1. Use the staging areas/lanes to get everything prepped. Don't be loading stuff in and out of the pontoon when in the launch lanes. These are the things that make people frustrated. Don't get into the launch lane until you are ready. This also applies after you load the pontoon onto the trailer. Pull out of the way and complete tasks (unload coolers, strap down the boat, etc..) in the staging areas.
2. When you are launching and loading, go at a comfortable pace so you don't damage your boat, trailer, or vehicle as well as not injuring yourself or anyone around you. Nothing will ruin your experience faster than damaging your boat or injuring someone. You will get better and faster as you do it more. Learn as you go. Don't let people get to you and make you nervous, rush, or do anything unsafe.
3. When on the water, take time to practice docking at a dock that is not busy. This includes days that are windy as those are the days that makes docking the most difficult.
4. If the launch area is not busy, you can always practice launching and loading a couple of times back to back. You will learn how to work as a team and understand what needs to be done and in what sequence.
5. Practice backing up the pontoon on the trailer in a large empty parking lot. Set up some cones, garbage cans, or whatever you can find and pretend they are the dock and you will back the trailer down the ramp next to them.
6. Communicate. Communicate. Communicate. As you get better, you'll adjust how you do things. Make sure that as you adjust your process as you get better/faster, but most importantly, you are doing it the same way. When both of you do it the same way each and every time, you will get faster, be more comfortable, and most importantly, safer.
7. Watch others. Sit at the launch area and watch others, especially those with pontoons. You'll see people doing it efficiently and you'll see people struggle. Watch what each of them do and try to mimic what the efficient people do and what to avoid. Plus you'll get some good laughs with helps relieve stress.
8. Have fun!!! Laugh at yourself if you need.
As others have stated, you will get better and faster. It takes practice.