LED Matrices for outdoors use — Project guidance

Hello everyone,
I would like to create a display with LED matrices to be used for outdoors.

So far I have worked with the Adafruit 16x32 and 32x32 LED Matrices and made a few displays that works very nicely indoors.
What I am struggling with now, is which LED matrices I should use (ideally low res with 5 or 6mm pitch) and how to make the enclosure waterproof.

There are many I could buy from China, but there are so many... I am finding it difficult to realise which ones to go for.

Does anyone have experience with similar projects and could recommend one (or a few) in particular?)

Many thanks in advance for your help!
Regards
Elso