Welcome to TN. I hope you enjoy your time here. Nice people and a lot of knowledge on this site.
You asked a question, "Where can I go". That depends on several factors. What you want to detect for and where you live or plan on detecting. I could list a hundred places to detect. Beaches, Civil War sites, old home places, parks, old school yards, and on and on. YOU have to decide what you want to dig for and again, what is available where you live. And here is one thing you need to know IF you want to be truly successful. Depending on what you are going to hunt, there is much time required doing research to be successful. I would estimate I have spent at least 90% of my time doing research vs. actually boots on the ground detecting. But that is for Civil War items. Much less time can be spent I suppose on other types of detecting. But research is a reward in itself.
So, good luck and happy hunting.