Stop watching CAD tutorials. Build this bracket instead.
Most people who "learn CAD" binge 40 hours of YouTube and still cannot send a shop a file.
The missing loop is short:
Fully constrain the sketch (if it is still blue, you are guessing).
Name the dimensions you will actually change.
Features first, fillets last.
Make a drawing a stranger could manufacture.
Export STEP + PDF. Never a screenshot.
If you want a first project: an L-bracket, 80×40×4 mm base, two holes each face, 2 mm inner fillet. Drawing with three views. That one part teaches more than another week of passive watching.
That is the method inside CAD Foundations — software-agnostic, Fusion 360 / SolidWorks / AutoCAD.