Electronics is a branch of physics and electrical engineering that deals with the emission, behavior and effects of electrons using electronic devices. Electronics uses active devices to control electron flow by amplification and rectification, which distinguishes it from classical electrical engineering, which only uses passive effects such as resistance, capacitance and inductance to control electric current flow; (Source Wikipedia: https://en.wikipedia.org/wiki/Electronics).

Electronic components are basic electronic parts packaged in a discrete form that are connected together to create an electronic circuit with a particular function.  Common electronic components include capacitors which are to store electrical charge, resistors to resist current, diodes to restrict the flow of electricity in one direction, transistors for amplification, and switches to open or close a circuit . Instructables, as well as many other resources, offer free online training materials to help you get started: https://www.instructables.com/Basic-Electronics-1/

A basic Electronics Kit may include bread boards, electrical components, and jumper wires. Additional tools such as a multimeter, power supply, helping hands, precision screwdrivers, plyers, crimps and wrenches are helpful as well. A dedicated workspace called an Electronics Workbench provides the space needed to accommodate bigger projects and dedicated equipment such as oscilloscopes, variable power supply, de-soldering gun, wires, hot air gun, as well as a place to store consumables.