Does anyone have suggestion on how to learn Node-red

I am looking learn Node-red to set up a universal communication (instead of putty or ssh) so that i can use msb instead of lsb. I believe Linux has good tools for serial communication and i will try to learn on those as well. There there is NILabview community and i am still seeking to learn on this. But as of now i am curious if node-red has good teaching materials.

When dealing with UART/TTL or rs232 or rs 485. I often want to use some pretty normal

https://nodered.org/