My story is exactly the same as yours, except I'm +10 years.
I'd suggest modelling simple transistor gain stages, look at inverting, non-inverting stages, buffers etc. Move on to diode clipping, watch how the wave is clipped on the top and bottom. Inject a bias voltage to the diode, observe how it affects the clipping.
Study how caps reduce ripple in power supplies. Use that knowledge and study how the caps charge and discharge - simple to do with a square wave function generator. Do some math for time constants and cap charging, check your results to the scope. Using the same r and c from the cap charge / discharge set up a simple switch debounce circuit, try to capture the event.
Move on to simple u processors or arduinos, watch the pwm change - keep moving on to faster and faster events to learn how to trigger the scope properly, etc - start slow move up in event speed - learn how to capture the events and have fun.