How can we earn from a freelancer job  in internet??

To become a successful freelancer first try to find the skills that you have and enjoy to do. Then search how other freelancers are selling the same services and create a better profile to compete with them. To grab first projects try to provide services at a lesser cost and get some good feedback and then gradually increase your value. Beside freelancing websites also try to build your website and even reach new clients. You need to keep on improving your skills and keep on working for a few months then gradually you will able to get more projects and right clients. All the best!

You have multiple options on the internet. There are numerous freelancing websites like Freelancer, Elancer, Upwork, Fiverr, people per hour, Etc.. So choose your category means jobs (like SEO, PHP, Content Writing, Web development)on these websites. Just upload your portfolio in your profile and bid the project then you will get the freelance project as per plan or hour. All The Best!!