no problem! the medium battle makes your opponants stats the same than yours... they get insane bonus when you go on hard of very hard. It's normal to go deep in red at the beginning. one big challenge of EB is the finances. you'll get used, and find strategy to get out of it faster and faster! then, when you'll want a real challenge, try sweboz! (with Saka Rauka, they get the hardest go at it on the financial point of view!)

Good conquering!