1) install node.js on your PC https://nodejs.org/en/
2) install expo by command line "sudo npm install -g expo-cli"
3) go to the folder with a template by command line "cd Downloads", "cd gala_expo_35"
4) run command in project folder "sudo npm install"
5) run command in project folder "sudo npm install -g expo-cli"
6) run command in project folder "sudo npm start"
7) expo will run in your browser, and after you need to run emulation IOS or Android, but you need XCODE installed.