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.
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.