How often are inductors used in electronics
While inductors are fairly ubiquitous in electronics equipment the typical electronics hobby enthusiast is best off waiting to buy them until he/she has a specific need.

Most of the typical Arduino, op-amp, sensor, blinking LED etc. type intro to electronics circuits don't need inductors. But they usually require resistors and capacitors. Capacitors can be stocked in advance because values like 0.1uF/50V ceramic and 10uF/25V electrolytics are so commonly used. Inductors tend to be more application-specific in terms of construction, value, current rating and other parameters. I have literally hundreds of inductors on the shelf but almost every project that uses an inductor it seems like I have to order yet another.

Good luck, enjoy the hobby!