Welcome!
Don't be scared. If your parameters are good and the other critters are happy it might be high time to add to the family.
Thanks for the photos!
Welcome to the forum! Don't be afraid... If your water and lighting are keeping your current ones alive, I would say you're ready. Just start with something that's easy, and not expensive.
As long as your system can support the coral you intend to get, go for it! As @Peace River just said, just do your research first on the coral's needs.
Welcome to R2R! You will find most everything you need here. Please PM me if you have specific questions and I can try to answer them or get you a good site/R2R member that can... . Join a local club too! Get to know your LFS owners...