i dont even know where the reset button is on the keyboard
Between caps lock and A on the back side, it's a tiny push button clearly visible in your pictures. You can't miss it.
Although I'd also add that, while some of your soldering doesn't look perfect, overall the board is assembled correctly. Those burn marks on the solder mask won't cause any issue.
Also, ATm32U4DFU in your device manager means that your board is already in bootloader mode, as if you pushed the reset button, so you can flash your firmware right away.