I'm Miles from the Social Care team at Shopify.
You're able to edit your Menu names in your Navigation settings of your Shopify admin.
You can learn more about menus and navigation in our handy guide here.
As you seem new to the world of Shopify, I thought I would give you some awesome tips as well for you to consider while you build your site.
One lifesaver for me when I was learning all about Shopify was the Shopify Academy. This is a group of free courses you can take to help you build your store and take you to the next level when it comes to growing your business. I've listed some courses below that you may find useful, but feel free to browse the catalog below as well.
Finally, one of my colleagues here at Shopify wrote a great post for new merchants based on feedback we received from many merchants in your position when it comes to being new to the ecommerce world. Aria talks about logos, images, menus and so much more! You can find the post here.
Let me know how you go, and keep up the good work!