/diy/ - Do It Yourself

>ordered PCBs came
>realized my custom footprint's through hole for a few break out boards have the wrong sizes
>had to drill them wider with a dremel and a 1mm drill
>now only the through holes connected to ground conduct
How could this happen? My drilling was precise
Any way to fix this?

I'm 21 and planning on building a house, what the fuck do I have to do (never had father/mother figure to teach me anything).

I have no idea how to plan this out financially, nor how the procedure from buying the land to starting to build looks like and where/how to save money energy wise and with the things I can do with my own hand.