Hi Lauren;
First of all, congratulations on the birth of you child! You now have at least two babies that need love and feeding
To answer your question on how often to update your content, the answer is, it depends. This is a question that I get all the time, and happen to have done a blog post on last month. Here it is, and I hope it is helpful. I find that lots of time folks don't know what to post as much as how often.
https://invitethemhome.com/how-often-should-you-update-your-content/
If you have any questions or comments let me know and I will try to help.
Take care,
Herb