Manchester encoding

Hello-
I would like to send data between two Arduino Unos. I plan on using the manchester encoding library located here.
https://mchr3k.github.io/arduino-libs-manchester/

For initial understanding I would like to send using the serial monitor on one board and receive using the serial monitor on the other board.

Can I connect the tx pin on one board directly to the rx pin on the other?

Thank
you

Can I connect the tx pin on one board directly to the rx pin on the other?

Yes. Don't forget to connect the grounds, too.