How to connect a terminal to your module see TTL Converter Terminal Connection.
How to enable the bootmode on your module you can see in Enabling Bootmode.
If you want to run uuu on a Windows 7 host have a look at Running UUU on Windows 7.
If you’re experiencing USB connection failures with uuu see UUU USB Failures.
If you have compile errors on a Host-System with modern Kernel (>=5.4) see Compile errors with modern Kernel on Host.