Good luck, you can do it. One piece of advice I'd offer that I read somewhere recently and liked is: at your stage, I would avoid "linking to your GitHub."

Instead, if you want to show your coding prowess, pick one or two repositories and link to those on your resume.

However, you'll want to be careful with this, especially never having written code professionally before.

I certainly didn't know what "professional" code _really_ looked like until I started getting reviews from folks much my senior and learned from them.