What should my levels be?

Hi! I was diagnosed with gestational diabetes a few weeks ago. I was told I needed to an endocrinologist and do finger sticks 4 times a day (morning fasting, 1hr after each meal).

Long story short the endocrinologist office had no available appointments for me so I’m currently just doing finger sticks and keeping a log, noting what I’m eating each meal as well.

I’m curious what others have been told they’re levels should be at for morning fasting and 1hr post meals? My doctor says 140 - which I believe is what I should be following. How often do I need to be over that to require insulin? If I’m over from time to time is that okay? If I’m over should I test again in say 30 minutes?

I’m not over often, but I I seem to be over by a few points when I eat a lot of fruit? So it’s okay sugar?

TIA