You need a phone, a LoRa module (Lilygo 2.1 for frequency in your country) and some time and patience.
But most importantly - you need peers around you to communicate with. So I would actually start by going to a Bitcoin meetup or some local hackerspace, check what people are interested in, check who you see from your roof and build the network with them.
Also - your radio antenna probably won’t do, you need a specific antenna for a specific frequency.
It is not plug-and-play and will have little usability if you are doing it alone.
Start here: