There are many ways of doing it. I am assuming that you have a card reader.
Start gparted and make the partitions.
You can do it from the terminal.
List all disks
sudo fdisk -l
You need to figure out which disk is your card; it's usually something like /dev/sdc. I will use "xxx".
sudo fdisk /dev/xxx
Some fdisk commands:
d: delete partition
n: create a partition
l: list types
t: set type (c for fat32. 83 for Linux)
w: save
q: quit without making any changes
Then you create filesystems with a command:
sudo mkfs -t vfat -F 32 /dev/xxx1
sudo mkfs -t ext4 /def/xxx2