‘99 VW New Beetle (tdi) Carplay Headunit

I loved modding my 2012 Fiat 500 to have carplay, and have since transferred to driving my New Beetle but the sound system is honestly terrible. It has some low budget aftermarket headunit from the 2010s right now. I have no idea how I would do this mod, as looking online has only shown me this mod for the v2 New Beetle (2002-2010~ I believe). Could anyone offer some advice or help?