This ~2$ module is easy to use. It uses only 2 data pins, but refresh rate seems quite low. It takes quite a long to update screen. There are same displays modules without I2C interface board, but they use more pins from your board.
Hardware setupFor wemos mini d1
SLC -> D1
SDA -> D2
VCC -> 5V
GND -> GND
After you have connected module and have software ready,
you have to turn potentiometer until you can see characters.
Needed libraries / softwareThere are 2 libraries, that have almost same name
I have used the first one.