Tinkercad
Tinkercad is free introductory 3D design software that is great for beginners.
Just make an account here and get started designing.
Comprehensive Free Video Tutorial Series available here.
Fusion360
Fusion360 is commercial 3D designb software
You can get a free Hobbyist/Personal Account here
Comprehensive Free Video Tutorial Series available here.
(This guy is literally paid by Autodesk to help people learn Fusion360!)
Adobe Photoshop
Photoshop is a paid image editing software that we have available in the DesignLab
Comprehensive Free Video Tutorial Series available here.
Arduino -
Arduino's are a great introduction to micro-computers and coding
You can purchase a low cost kit with everything you need here
This is a vetted set of lessons to teach you the basics of using and coding an Arduino
(Many of the other sets available on the internet have coding mistakes that will frustrate a beginner - this set has been tested and corrected!)
Coding -
Coding is a skill-set that everyone should have some familiarity with, just like writing
If you are brand new to coding, we recommend starting with Python or Javascript as you can see things happen quickly, but in reality, there is no wrong coding language to learn
Here is a MASSIVE LIST of free coding resources