No worries, I know how you feel. It was so hard for me to learn to manipulate the oar, and I honestly still slip up when I’m rowing portside. One of my friends basically rowed backwards for like an entire practice when we were learning because it was so different from the erg.
Try to remember that even though it feels different, it is the same body and leg movement as the erg. You still drive with your legs and push through your hips. You also still use your layback.
The difference is that instead of going straight forward and having your arms in front of you (as you would on an erg) you have to lean into your rigger and sort of twist towards the oar. Swing from your hips and have your outside arm end up in between your legs, then take the stroke. It feels foreign and awkward at first, but once you find your rhythm, it will feel graceful and strong. You’re at full compression when you’re at that top inch, just like on an erg, the main difference is that instead of being forward facing at all times, there’s a lean and twist component added.
I hope this helped! Good luck to you and your crew! Y’all will be pros in no time!