Hi! Why are you looking for the easy way? Don't you think thousands of people surfing the net for "the" answer would have sprad it all along. That'S why people without the knowledge, pay either service providers or for reaching and tools.
You can learn it. Either you put money in it or effort.
My best advice as an entrepreneur and a believer in entrepreneurial design: Concentrate and focus on your core business! Why:
1. you have fun
2. you are highly efficient
3. you make money to pay outsourcing
4. your service provider is highly efficient and cost effective
It will take you time to learn, to implement, to establish and to make money.
1. Do you want to be a SEO specialist or a writer?
2. Do you want to do all of it as a hobby or run a business?
Since you are talking about a decent income, I expect you are looking to run it as a business. Business needs investment! Be it time or money.
Decide where and how to invest.
I painted a black and white picture, surely there are shades of grey. The grey way will cost you most time and energy, since you have to do your work, to improve your marketing skills and to implement the marketing. Most probably, and this might be a problem, your business won't really kick in, unless you find a topic like a masterpiece everyone needs.
Develop a strategy, develop a business, work your way and enjoy it!