Multiple components in circuit
Basically you will need to make (or buy) a power supply module that can supply the required currents and voltages. This can be done in many ways, depending on the loads. If a low current and low cost is required, capacitive droppers may be used - but that means everything remains potentially at line potential. Galvanic isolation is probably a concept you should read up on..

The most realistic option today is switch mode power supplies. They provide galvanic isolation, and are efficient, cheap and compact.

The easiest DIY approach for a beginner is probably a linear power supply: a transformer, rectifier, capacitor, and voltage regulators. They require big transformers, have poor efficiency, but are extremely simple to grok conceptually.

If you add more specifics about your load you'll get better answers.