An operating system serves as a bridge between the user and the hardware of a computer. An operating system's primary function is to create a conducive environment for an application software to run efficiently.

Devices, processors, memory, and other resources are managed by an operating system. Some of the key features of an operating system are process management, resource management, storage management, and security.

Attend a few introductory computer science courses:

An operating system must be developed with a solid grasp of computer hardware, algorithms, data structures, and resource management, unlike a web application. You can't expect to create an operating system after reading an online tutorial—people with degrees in this field! The free online version of Harvard's Introductory to Computer Science course is offered by EDX.

Pick up a sophisticated programming language, such as Python

The next stage after gaining a firm grasp of computer science fundamentals is to become proficient in C and/or C++. Learning a language is essential, just as learning computer science; without strong application writing skills, you cannot design an operating system.

Check out Dartmouth's C Programming: Getting Started course, which is available for free through EDX, if you're new to C. You can enroll in the following course in the series after finishing that one: Foundations of Language in C Programming. Proceed to later courses such as Pointers and Memory Management and Modular Programming and Memory Management.

Pick up some assembly language knowledge

Low-level languages called assembly languages are made to interface with various processors. You'll need to master the version for the processor type you're coding for because assembly differs depending on the kind of processor (for example, x86 assembly Language is different for Intel, AMD, VIA, and other processors).

If you study this open-source book all the way through, you should have a good enough understanding to construct an operating system.

An excellent assembly book that is accessible both offline and online is The Art of Assembly Language.

Additionally, you should thoroughly investigate the kind of CPU or processors your operating system should be running on. You can quickly locate the CPU architecture manuals by searching for them on Google under terms like "Intel Manuals," "ARM manuals," etc.

Finish the operating system tutorial

OS tutorials will guide you through the steps involved in setting up a rudimentary OS. This helps you become used to the procedure and determines whatever parts you are missing. You'll be well on your way to building your own operating system after finishing a few tutorials.

A lesson called Bare Bones will assist you in writing your first basic 32-bit kernel. The next step is to use Meaty Skeleton to organize your own operating system after finishing the instruction.

An online book called Linux from Scratch shows you how to build your own Linux operating system.

A free book about building different operating systems from scratch is called Operating systems from start to end.

Determine your operating system objectives.

How would you like your OS to function? How ought it to appear? Are you merely trying to customize the appearance of your desktop, or do you really need to design a full operating system? Before starting to code, keep all of these points in mind.[3]

Think about working on projects with a group of programmers. The project's development time will be greatly reduced if a team of developers is working on it.

To make it easier for people to assist you, add your project objectives, schedule, and inquiries to your public repository.