I killed my first trans pump

Ok so I know better...done this a dozen times, and always been 12 for 12. But I did it this time.. didn't seat the torque converter properly, and shaved the pump gear tangs off. I'm getting older now, and sliding under a car with a 727 on my chest didn't seem wise, so I did it on my 2 post lift with a trans lift. While trying to mate the trans to motor, it rocked, torque converter shifted, and I thought I pushed it right back in...but nope...didnt..took that sucker out on first fire..
So questions for you trans guys??
I ran it and broke the cam in, then realized I had no gears, shut it down, dropped the pan, found a metal shavings, and lots of pretty red metallic paint...what should I do to save this trans? Can I flush it?
I already got the trans back on the ground, ready for a new pump.. and which I have new pump and converter. Thanks in advance...

Me-12
Karma-1
New standings 12-13
Lucky 13