Hello

First time here and kinda new to mechanic work. Where do I post my questions on here?Can I do it here,if so,here goes... I have a 1997 Ford F150 Ext.Cab 4.6L V8. I just bought the truck that was not shifting right when driving and wouldn't reverse. So I changed the transmission,got it back on,tried to turn engine to put back on nuts from TC to Flywheel and now the flywheel won't spin. I guess the torque convertor is not all the way seated on properly. The transmission went on smooth,no troubles getting it on. I see now that the TC bolts are even with the end of trans. Is it possible that i messed up something? Can I just back it up a little and seat it on all the way and put it back on? That was the # 1 thing I had on my mind when I put it on was to make sure TC was all the way on properly and I forgot,it was just one more spin to be on right. What should I do. I didn't spin the engine much because I noticed right away the Flywheel was not turning to put nuts back on. Can someone help me? Please... Thanks