[1.12.2] Custom events when player tries to mine blocks

Hi, I am fairly new to Minecraft modding. I have been reading the documentation past two days trying to figure out a way to make certain events happen when player tries to mine blocks. For example, if a player tries to mine dirt with fist, give them blindness (or something in those lines). I have been toying around with the PlayerInteractEvent, but haven't been able to get it to work properly. I am using it with the @SubscribeEvent and the @EventBusSubscriber, but so far I can't seem to even cancel the event, so that it doesn't take effect. Also Reading the documentation I didn't find a way to see what block the player is interacting. Does anyone have any idea how I can proceed?