What to put under turf on bedroom carpet?

I just purchased full simulator kit that will have 7.7x10x5 Enclosure and I will be putting this in a bedroom in my house. However the bedroom does have carpet so I’m trying to figure out what to put under the turf in order to make everything level, keep the turf in place, hitting mat in place etc. any suggestions?

I will be using Uneekor Mini Lite launch monitor so will need to have a sturdy place to sit next to hitting mat as well that will also make it easy to keep it leveled out properly.