What's the best way to learn Programming, Networking, Security

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273KB, 441x334px

What's the best way to learn Programming, Networking, Security from the ground up??
>passed compTIA A+
>passed compTIA networking+
>passed compTIA security+
>passed compTIA linux+
>passed compTIA server+
>have associates and 4 credits from bachelors in comp sci
>probably(i think) could pass casp but haven't yet
>never had an actual job doing anything but helping others
>still don't know exactly how networks/security, or even computers in general, work on a fundamental level. i feel like i don't understand something basic, but don't know exactly what it is
with all the classes i've taken and all the books i've read i should understand more intuitively. what am i missing? is there a good place to go to start at the bottom? starting from learning everything about how computers and networks work. i've read a bunch of "basics" and "dummy" books but i feel like i need to be able to set everything up myself and build all the programs myself in order to really be able to understand