When you start learning, you’ll be so amazed and confused by the power of programming that you’ll be pulling your hair.
When you start understanding it, you’ll spend days in your single pair of jeans and lose a sock.
When you get better at it you’ll spend hours sitting on your ass coding the shit out of that int main() and you’ll be so physically tired just by sitting that you can’t wear a neat pair of boots anymore, anything comfortable will do.
There’s nothing such as ‘dressing like a computer geek’.
Eat. Sleep. Code. Repeat.
And you won’t have to worry about dressing.