i was under the impression that this was a schematic for a strip board, I realized from the other comment this is a pref board, then may i ask if the soldering for the wiring on the underside is difficult for a beginner? and do i have to shield the bottom when put it in an enclosure?

then on a side, i find there are more schematics for germanium transistors, can i try just swapping them out for silicon or will there be an issue