I'm totally new to rowing so figured might as well register and say hello

Yesterday I have completed my only 5th session on 5000m (never done any rowing before) and wondering if my time is any good for a complete beginner?
Here is my time and individual splits:

First session was 19:30 if I remember correctly, then 18:58, 18:55, 18:46 and yesterday 18:42 with stats as above.
What do you guys think?
Adrian