What is the best way to become tech savvy a class or trial and error?

Through trial and error, I became the class nerd in 2-4 years. However, I did have a thing for computers in the first place, so a class could be helpful.
 
Through trial and error, I became the class nerd in 2-4 years. However, I did have a thing for computers in the first place, so a class could be helpful.
 
Through trial and error, I became the class nerd in 2-4 years. However, I did have a thing for computers in the first place, so a class could be helpful.
 
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