Thanks for the link. It does not matter if you buy from Poland or from Outer Mongolia. We can see that it is a Waveshare product with documentation https://www.waveshare.com/wiki/1.8inch_LCD_Module
Regarding Logic levels. This is from the datasheet:
and this is from the schematic
So you can see that there is no way that you can use 5V logic. However simple series resistors will probably be "safe".
I strongly suggest that you use 3.3V logic. e.g. Zero, Due, STM32, RaspberryPi.
If you must use 5V logic do it via resistors, level shifters.
Since you clearly have a Waveshare item I would be confident it is ST7735S.
Just use 3.3V logic and try all the different initR() values.
David.
p.s. please measure R1 with a DMM. I would expect 100R and not 10K.