I definitely think your friend gave you great advice. I would definitely start of with two classes first and see how that works out for you. And if you are able to find a good balance in your schedule and don't feel to overwhelmed maybe you could take more classes next semester.
I am so glad that you are pursuing your degree and that you have been able to get married too!!! I'm graduating in two months and I hope to get married in a few years once we both get established.
I pray that everything works out well for you.