Hi Ruth, you really can do this. I interviewed a mom who writes for a living here and talks about the struggles with raising kids at the same time, you can read her article here https://triedandtruemomjobs.com/become-freelance-writer/. Us moms really have super powers, you can totally do this. Just have to find the right balance, I definitely recommend reading the above article.
Otherwise, it’s as easy as adding a link to the video description and asking people to click on it. Coupon codes are a huge bonus (if your affiliate offers this) since often times, you can give people a discount using your custom code, while crediting you the sale, without them even having to click your affiliate link. This results in higher conversions. (Tyler Moore does this).
If you're serious about making money online, start a blog. Blogging is one of the easiest and most sustainable income sources. As long as the blog is setup the right way, in the right niche, with the right content targeted at the right audience, and the offer is complementary to the content, you could make a tremendous amount of passive income from a blog.
Then once you’ve got your domain name and hosting sorted out, it’s time to pick a CMS, or Content Management System, that will let you update pages, build your blog and integrate with all the other services you need. It’s hard to go wrong with WordPress—the CMS powering close to a quarter of the internet. Keep in mind that eventually as you start growing traffic to your blog, you'll be wise to invest in a managed WordPress hosting plan from a company with great service like Kinsta, where all of the settings are custom-tailored and optimized to work particularly well with WordPress-powered websites.