Confusion – Need Help Overriding html File and Passing Data

Hopefully I’m not the only one feeling so lost on the Magento 2 learning journey. I am trying to override a third party module’s onestepcheckout shipping.html file. I successfully did it using the requirejs-config.js method but none of the data is passed through. Are there other steps I have to follow in order for data to pass (third party has the js file, which I thought that it would pass into my override html file)? I am just seeing the template items available, but it appears no functionality has passed or data. I know my request is more basic, and I am still trying to wrap my head around this complete change from Magento 1, which is now cake walk compared to this methodology that is all new to me. Thank you!

var config = {
map: {
    '*': {
        'Mageplaza_Osc/template/container/shipping.html': 'MyModule_Shipping/template/container/shipping.html'
    }
}

};