First Playtomic Game

I have booked my first game on Playtomic. I play tennis a couple times a week and have played casually before maybe a total of max 20 hours. I have joined a game tomorrow but I have no idea of the levels and if it is going to be unevenly matched. Is there a good way to judge how good people are going to be if their reliability is low?

It’s me (1) never played competitively so rating means nothing and (0.5) played once against (0.7) played twice and (1.2) played 4 lost 3.

My assumption is at this level it doesn’t really matter too much but is there a good way to go about messaging them and checking what the story is?