Here's some free stuff that you can use to teach yourself

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Autodesk, a leading software company based here in Oregon, offers lots of free apps for design, simulation, and experimentation. Find it in the App Store or Google Play.
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Autodesk gives students free access to many of their programs
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We use GitHub for our coding backup. You can request a free student account.
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Library:
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Visit this great space to practice or gain skills, conveniently here in Portland: