I also went from a pop up to a 5er. My feeling was you had to initially cut the wheel harder to get the 5er started turning and then back the wheel off once it starts to turn and gradually get it to where you want it. It's always better to pull a little too far forward initially than to not pull forward far enough. My drive is gravel and where I park it the passenger side is ~2" lower ( need to add gravel over there) and I have a 2x12 on that side to make the 2" up. I can hit it first try even with it being on my blind side. Took quite a bit of practice and using other points on the drivers side to get my bearings but I got it and can back that thing up like a boss now.
Our first try into the driveway was an experience though the day I brought it home. We're on a busy road with a 55mph speed limit. I had hazards on and pulled up to start my approach and cars backed up behind me. I had to wait a few seconds for the cars coming towards me and have enough gap between cars to start. The cars behind me were getting impatient and my wife waved one around....right in front of a car coming towards us. No wreck but I'm sure both cars had some choice words for her....and me. Now I do it without a spotter. What I have to watch for is when I pull into the other lane and then swing back out to start my angle cars will pass me on the right from time to time. I hate that. I've almost pulled into a couple doing that. People are in too much of a hurry. If no cars are coming towards me I can literally have it in the drive in 10-15 seconds.