Have a gaff on hand for the big ones
safety is always the priority, if you dont feel like you are ready then dont make the jump just yet then dont. Comfort and confidence are most important, especially in the face of adversity. Halibut take time on the water. Good luck, hit me up when you head out im always in for a good halibut hunt.
Also in my personal experience, having a fish finder has easily made my catch rate double. Knowing what is below you makes all the difference between fishing in the middle of no where and fishing in the honey hole. I wouldnt spend too much on one though, remember that in the event of chaos, you should be prepared to lose everything on board. Hopefully it doesnt come down to that haha