This site has a getting started section: https://www.adsbexchange.com/how-to-feed/ but I want to know the hardware to buy, the right place to put the receiver etc. Last time I did this (broadcasting police radio to broadcastify) it was a lot of forum searching and I'm hoping to avoid that this time.
ADS-B Exchange has a very active Discord channel where they will help you pick the right equipment and walk you though the setup process. https://discord.gg/JJ6QC4c