I am going to stress what Metelcom said along with some others.
Without the basics learned through a mentor or qualified Tech you are going to have trouble. PLEASE get some hands on training before you take on this project.
Now the way you described wiring to the block is not what I prefer but it will work as long as they are labeled well. I prefer in order. 1-6 on the left 7-12 on the right.
This class on telecom does not include data wiring. That is a new subject
https://www.la-cable.com/telephone_technical.htm#USOC No you dont use 49 and 50 or 24 and 25 for anything. they just happen to be open because the blocks were designed for 25 pairs and the IW only uses.....well you do the math LOL
Leave the bridging to the phone guy who will be installing the system. The cables dont need to be chained just terminated.
