I started rowing this month and yesterday I did a 2k at 7:55 (8:13 at the start of the month - the improvement was probably just due to better pacing). I have a (most probably unrealistic) goal of sub 7 minutes. I used to do some high level athletics in my early 20s, I'm 39 now, but the pole vault is slightly different from rowing...
Are there some good training session examples which I should be doing?
I've done a 5k at 2:30/500m
Also a 250m, 500m, 1k, 2k, 2k, 1k, 500m, 250m pyramid at around 2:20/500m
And 10x500m at 2min
These are just sessions I've been playing around with, but some guidance would be nice

Thanks