What's considered a good time for 1000 m?

I (29F) started swimming again after 11 years.

I swam competitively until I went to university. Started again because it is part of my physiotherapy for a chronic back problem I have been suffering from.

Swim 1 - 31 minutes Swim 2 - 28 minutes Swim 3 (today) - 25 minutes

I don't expect it to keep getting faster from now of course lol. But I am curious as to whether this is an okay time for an unfit beginner who used to have experience?

This has been so life-changing, swimming again. I haven't felt this good and painless in so long.