What other Certs should I get After I get my Software Development Certificate

I’m getting out the military and using a program called VET TECH to go to a 6 month program for Software development. They’ll teach me how to use HTML, CSS, JavaScript syntax and other things to be able to create a website and launch a web app. I’m wondering what other things should I invest my time in to sharpen my skills that most people don’t ever mention or do mention 🤷🏽‍♂️

Thank you guys for the help. I’m a little nervous but I understand I can’t fail & I must make this happen for myself.