Shift from forward to reverse early and often. There is no transmission on this boat, and shifting doesn't hurt a thing.
Use No Wake Mode (NWM) at level one and leave it on while docking/trailering. This will keep thrust up, then you just have to modular fwd/rev to maintain the speed you want. You can "bump" into/out of "gear" as much as often as you need. Forward will steer the bow, Reverse will steer the transom. COme in slow, then bump into reverse and "slide" the rear around to keep aligned. Then bump into forward again to move forward.
It's all about momentum management. With NWM enabled you can add/remove momentum and speed from your course at will. It's not a car and won't "jerk" when you transition. You can (and should) go forward with some speed, then put it in reverse. You'll still physically move forward, but you'll start slowing. Once you're near a standstill, or the speed you want, bump back into forward.
It is also completely acceptable to be in NWM, at any level, and be in neutral. Doesn't hurt anything. Should be really close to a "neutral" position with little to no movement.
Practice all this around a buoy or other floating thing. Once you get the hang of it, you'll be able to pull off some impressive maneuvers. For instance, my wife trailers/launches our boat. When she picks me up at the ramp she comes it at about a 60deg angle, with NWM in level 2. She cuts hard to the side and hits reverse. This "slide" the transom of the boat over and lets her "back up" to the dock. She keeps it in reverse until she's close to where I can step on, and as I do, she slides the controller into forward and away we go. No need for me to do anything but step off the dock onto the swim platform.
Also, keep in mind there are TWO detents in forward. The first is "Thrust Directional Enhancement" or TDE. You can use this when you want small amounts of forward thrust, but still want to maintain direction control.
@haknslash did a great thread on this. Have a look.-->
https://jetboaters.net/threads/how-i-use-no-wake-mode-and-tde-to-retrieve-my-boat.17161/