Left W10M and had some questions...

I have left W10M and picked up a used Nexus 6 to tryout android. One of the things I really liked about W10M was how Cortana would pop up a reminder when it was time to leave for an appointment based on the traffic. I see that Google Assistant has travel time for any appointment that I have on my calendar, but I want to have it give me a full screen pop up to tell me its time to go. Is something like that in there and I am just missing it?

I also wanted a way to have reminders snooze for a different amout of time other than an hour or 15 mins. Is there a way to change this also?

I am an Android Noob for sure and could really use the help on this.

Thanks.