I recommend that you start with the gps, than the User_Camera (drowsiness decector), and than the distance measurements. This is to ensure that you will have the neceassry libaries needed in the virtual environment

Pi

Update the RPI (try to update the RPI once a day)

(updating can take a little as a minute, and sometimes up to one hour)

sudo apt-get update

sudo apt-get upgrade

Create a Virtual ENV

(virtual env is recommended as it helps keeps packages organzied. Some programs/code require certain version of libraries that may not be comptaible with other the libraires installed, so to avoid any issues it is best to use a virtual env.)

sudo pip3 install virtualenv

python3 -m venv name-env

source name-env/bin/activate

deactivate ( to leave virtual env)