Here is a little idea or you can call it a method if you want.
See, earning money from Internet has become very tough as compared to few years ago. Why? No offence but it is because of the fact that there are so many people from Asian countries (especially Indians) jumping on a same boat. This is because of the cheap Internet connectivity and lack of jobs in those countries. I am also an Indian and I'm doing Internet marketing since 2008 and earned around $40,000 or more.
But, that doesn't mean you can't earn money without investment. You can. But for you to earn money without investment, you need to start from the problems around you. Instead of jumping straight into a clash of clans niche, just find a thing close to you that people want.
Step 1 : Find an issue or a topic that is in a close proximity of yourself. Like around your block or within 5 kms of you. You need to find what people are looking for and what people will search on Internet. Now trust me, every 1 out of 5 people you meet have a smartphone with Internet today. Don't trust me, go out and do a survey.
Step 2 : Once you find a niche close to where you live, start a blog on blogspot. Post a good informative article about the niche. (Example : What are the best gyms around "my area" / top 10 gyms around "my area") replace my area with the name of your area.
Step 3 : After you post a very informative article, share it on social media. I believe you have Facebook account atleast. Join groups in your local area and post a link to your blog. Remember, you need a very good article, with a good research done or people will call you out.
Step 4 : Do those above steps with many different niches like best restaurants, best hospitals, best dentists. Your website is bound to get ranked as the niche is super low competitive. Once you have atleast 10 posts, apply for adsence and you are going to get approved for sure. Google wants people like you. Keep posting articles until you earn around $20 and then out of those $20, invest $2 in a domain. Purchase a domain that can be used to target many other things too and not just your area.
I hope you begin with this method and get back to us with your results.