any other way of contacting me is fine too (see https://github.com/laanwj), doesn't have to be DM here 😀 

no, i don't know any way to figure out if a lightning node is connectable, except connecting to it from another node-or maybe simply checking the address+port is reachable using `nc -v` or such

there may be websites that try it for you and report, maybe amboss.space or other lightning explorers, but not sure