Rfid programming

I’m new with SPI interface in arduino. I’m trying to interface MFRC531 with arduino using SPI but I seriously can’t understand anything looking at the datasheet. I’ve managed to connect the pins of mfrc531 required for the SPI interface given according to the datasheet. Kindly some help!
Datasheet link: https://www.mouser.in/datasheet/2/302/MFRC531-841156.pdf

do you just have the chip or do you have a breakout board?

I have the chip and soldered it on a board not exactly a breakout board but a spare board where mfrc500 was previously attached, which I removed and soldered mfrc531.

What, specifically, is the problem?