Post Install Script In Question

#!/usr/bin/bash

cd ./Setup_Fedora_Sections

function Welcome {
    #Opening Section
    WELCOME=$(echo "Welcome to Setup Fedora: Optional Programs section written by Dustin T. Carr! This script is ment to be run whenever Fedora is newly installed as it contains the programs that are not neccessary for your system to run and be basically useful after a clean install.")

    echo $WELCOME

    echo $'\nDo you wish to continue? Y/N\n'
    while true; do
        read -p "" yn
        case $yn in
            [Yy]* ) echo ""
                    break;;
            [Nn]* ) clear
                    echo $WELCOME
                    echo $'\nBye.'
                    exit
                    break;;
            * ) clear
                echo $WELCOME
                echo $'\nDo you wish to continue? Y/N\n';;
        esac
    done
    return 0
}

function CopyRepoFiles {
    echo $'Have the repository files been already copied over? Y/N\n'
    while true; do
        read -p "" yn
        case $yn in
            [Yy]* ) sudo cp -vf ./Outside_Required_Files/Repositories/*.repo /etc/yum.repos.d/
                    TestInternet
                    break;;
            [Nn]* ) TestInternet
                    break;;
            * ) echo $'Have the repository files been already copied over? Y/N\n'
        esac
    done
    return 0
}

function Update {
    echo 'Time to update.'
    sudo dnf -y update
    return 0
}

function PostInstallMenue {
    #Step two: continue to installing the optional programs programs
    echo $'Now let\'s install the optional programs.'
    ./Optional_Programs/Optional_Programs_Install_Menue.sh
    exit
    return 0
}

function ConnectToNetwork {
    echo $'We cannot find an active internet connection. Please connect to the network then try again? Y/N\n'
    while true; do
        read -p "" yn
        case $yn in
            [Yy]* ) TestInternet
                    exit
                    break;;
            [Nn]* ) echo "Okay bye then."
                    exit
                    break;;
            * ) echo $'Please connect to the network then try again? Y/N\n'
        esac
    done
    return 0
}

function InstallWirelessCard {
    echo $'Your wireless card is inactive, do you wish to try run the install for it? Y/N\n'
    while true; do
        read -p "" yn
        case $yn in
            [Yy]* ) ./Setup_Fedora_Install_Wireless_Card.sh
                    break;;
            [Nn]* ) echo 'Okay bye.'
                    break;;
            * ) echo $'\nDo you wish to try to run the install of your wireless card? Y/N\n';;
        esac
    done
    return 0
}

function TestEthernet {
    echo "Checking the status of your ethernet card."
    #Check if eno1 Network Card Is Available
    ECARD_STATUS=$(ifconfig eno1 | grep UP |wc -l)
    if [ $ECARD_STATUS = 1 ]
        then
            TestInternetSpecial
        else
            InstallWirelessCard
    fi
    return 0
}

function TestInternetSpecial {
    #Test for internet connection
    TEST=$(ping -c 1 74.125.21.14|wc -l)
    if [ $TEST -gt 5 2>&1 ]
        then
            Update
            PostInstallMenue
        else
            ConnectToNetwork
    fi
    return 0
}

function TestWireless {
    #Check if wlo1 Network Card Is Available
    echo 'Checking the status of your wireless card'
    WCARD_STATUS=$(ifconfig wlo1 | grep UP |wc -l)
    if [ $WCARD_STATUS = 1 ]
        then
            echo 'We found that your wireless card is active, checking internet connection.'
            TestInternetSpecial
        else
            TestEthernet
    fi
    return 0
}

function TestInternet {
    #Test for internet connection
    TEST=$(ping -c 1 74.125.21.14|wc -l)
    if [ $TEST -gt 5 2>&1 ]
        then
            Update
            PostInstallMenue
        else
            echo 'We have found that there is no active internet connection available. Wel will troubleshoot the issue.'
            TestWireless
    fi
    return 0
}

function Main {
    #Clean The Screen
    clear
    Welcome
    echo 'This script operates under the impression that you have an active internet connection.'
    CopyRepoFiles
    return 0
}

Main