Replaced front brakes, now more probs?

[White70C20]

Well I fixed the problem with my front brakes. It turns out the lining on the pass. side front shoes came un-bonded and cracked apart. When I took the drum off, pieces of lining came falling out.
So, I replaced the shoes and all the springs on the front. I adjusted the brakes to where they almost drag, but the drum still spins.
I got it out on the street and now the brake pedal is very soft. I'm having a hard time slowing down.
My friend says it's just going to take some time for the new shoes to seat into the drums, and that I should apply the brakes a few times while backing up to adjust them.

When installing the new shoes, I did push in on the plungers on the wheel cylinders to get the shoes to fit snug. Could I have caused a leak?

Any ideas/suggestions would be appreciated. Again, this truck is my daily driver.
Thanks!