You can start an online business working from home for free using simple methods that are proven to be effective such as blogging and article marketing.
I have done and so can you but you will need to learn the methods that are involved as you will not be able to do everything all at once.
You can start a blog about any topic you wish, there is no limit and you can make your first dollar within just a few days if you put your mind to it and carry out simple tasks that allow you to drive targeted traffic to a certain page.
Offering free information is key here, you have to offer someone, something that is valuable for free such as some great information that will allow the reader to take action on it without them having to spend any money.
This is how you gain trust fro your readers and in time, make more money working from home.
I'm sure you have a hobby, so all you would have to do is explain to people about how to start your hobby, the things you need to know the most as im sure that many other people will want some knowledge about this same subject.
See what people are searching for within your subject and then write about it, drive traffic using articles and placed banners on your website to relevant affiliate products and earn a commission or display Google adverts.
You can make money working from home this way but this may take a little time to become established as traffic is hard to find when you are first starting out.
Remain consistent within the article marketing and you will find success.