This is a hard theme, but it's also something I really like to work with. The good thing is that learning 1 bit is very useful for working with any type of pixel art, for example:

These props I made for Celeste are not 1-bit per se, but knowing how to work with 1-bit helped me a LOT while designing them.
Here's some other tutorials I made that can be useful
Sara Quinn
2017-09-26 17:17:25 +0000 UTCPedro Medeiros
2017-09-26 17:16:08 +0000 UTCSara Quinn
2017-09-26 17:13:07 +0000 UTC