I have installed Claude Code (it says it was successfully installed) and when I type in 'Claude" in the terminal it says the term is not recognized, is there a step I might have missed?

Hey Jay and all, I come from a non technical background and started using CC this week. Been loving it! I'm enjoying the process of learning complete basics (like CLI, scripts, databases, etc.) and I'm wonder if y'all have any advice on the most important topics for overall security, safety, best practices in building as a non technical user? Thanks in advance!