I'm a absolute new to rowing and do not have much ideas about. I'm 47 years old, 209 pounds, 6'2" tall and from Austria. So my native language is german

I had a serious cycling accident and started rowing to strengthen my back in October. In the last few days I started with the concept2 WOD and noticed that I am quite high up on the honor board. Yesterday I was placed 17th but my stroke rate was about 30 and the drag factor was 181. 153 Pulse, the idea was to average 280W (Cycling background

At 2:00min/500m, 30sr and Drag factor 160 I've 125 pulse, when i go lower in both, pulse rises. So at the moment this seems to be my sweet spot.
Should I train for lower stroke rates, and lower Drag factor, to get a harder pull? Technique?
Thanks for your answers, Nik