If you can accomodate some simulation inaccuracies, I suggest you try this circuit simulator. https://falstad.com/circuit/ Extremely frugal on resources.

This is also downloadable as an offline circuit simulator.exe on the same site. To my knowledge, this is not accurate like LTspice or others, but gives a nice visual representation of the working circuit.

I suggest this as an option with a very low learning curve.