Travel insurance guidance

Hi all! I’ve traveled in the past and luckily never needed insurance. Haven’t travelled too far bee to Mexico and other parts of the Caribbean.

I’m currently planning my European summer. I’ll be going with my 63 year old mom, 14 year old daughter, and 1 year old daughter. I’ve looked at some policies and I’m just overwhelmed. I would like the option to cancel for any reason. Hoping I don’t have to use it. And medical coverage. I’ve seen that some companies allow me a 21 grace period from the day I booked anything. I really want to book our flights because I don’t foresee prices going down.

Can someone give me some guidance on what company and what to specifically look for. I the policy’s I’ve checked are close to or a little over $400.

TIA!