If you are seeking advice from experienced reef keepers and professionals you came to the right place! There are different sections (reef chemistry, hardware/equipment, fish health, etc.) and many very educational articles.
Just take your time to look around and if you can't find what you are looking for, the community will gladly help you :)
I think a great place to start would be a tank thread and share a little bit about your reef tank and journey! If you have specific questions, there is a ton of information on R2R so it can be a bit difficult to find, but the search bar function is one of the best I've ever used! If you can't find what you're looking for, of course always feel free to start a thread!