Hi! To advance further in any career, the most important thing would be to develop your portfolio and develop your understanding of computers. The purpose of a portfolio is to show off things you've done in the past to help people better understand your strengths and passions. In the case of the computer industry it would also depend on whether you want to work with software (code, internet, windows OS) or hardware (monitor, desktop tower and the parts inside of it). If you want to work with software, my recommendation would be to learn some code. If you want to work with hardware, then I suggest that you tinker around with electronics, learn how to build a computer and learn how each individual part works.
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