Is it terribly difficult in your 30s?

My question to y’all is, is it really harder to get pregnant and stay pregnant in your 30s?

Background:

I’ll be 29 this year near the end of the year and I have an IUD to avoid getting pregnant unplanned. Anyway, due to my wanting to get my life in order and waiting for someone to love me and marry me before I have kids, I’ve accepted that I will not be getting pregnant on purpose until I am in my 30s. My only two friends to have kids have clearly had their kids before they were 30. One was pregnant at 23 and now again at 28 and the other was pregnant at 28 (turned 29 right as she was finding out) and is pregnant again at 30 (and will be 31 when she has the baby). At the second friends first baby shower, her bf’s grandma started telling me to plan to have a baby before 30 because it will be harder for me from that point on. The friend who had her first kid at 23 has also said the same thing. I’ve had cousins who have had multiple pregnancies in their 30s, but have both mentioned that they were high risks. I’m just curious. It it really harder to get pregnant after 30? I’m trying not to put pressure on myself to hurry up and find someone or to get my iud removed and let whatever happens happen just so that I can get pregnant before 30. I’m just very in my head and concerned about it.