Can I get online job

What you are looking for is the ability to work "remotely", whether you conference in or occasionally convene in an office-like space depending upon your company style like Scrum, etc. and your role within the organization.

The common expression for what you're talking about is "telecommuting". There certainly are jobs like that to be had, but you'll have a hard time getting one as a first job. If that's your situation, you might consider doing some volunteer work first to build experience to add to your CV as well as some live examples of completed projects for your porfolio.

Even the volunteer work may require an extensive portfolio of sample projects, so start by collecting those if you don't have them already.

Some companies offer the option to work remotely, but it's typically not an option when you first start...it's more earned than provided at the beginning. I did work a 2/3 remote help desk position, which was nice. I did have to be present in the office for the other 1/3 of my time. In my current company I can only work remotely if I'm home sick and still feel like working. Otherwise, I'm expected to work in the office. Even if a position could be totally done 100% remotely, many companies still hold firm to the idea that in order to hold employees accountable they need to be physically present in an office somewhere.

If you mean freelance it is possible, I have a lot of experience with this. For example once i needed a simple forum that would not be overloaded with unused functionality and would have open code, I've got a coder who did it for me for 10 usd, as he was a starter. I liked his job, and then I needed a site for my new business direction and I ordered it to him for 500 usd, he made it briliantly. For the next site I paid him 2000 as it was for a more serios business and needed some support later when I looked through the code the thruth was that the major part of the code for all the sites was much the same and they were different only in graphics. Well at start you ask as little as clients are ready to loose and do your job with best effort, very soon you will have experience and clients base. So the common practice is to start with very low price and at getting the experience and reputation increase it.