Welcome! Glad you joined. You'll need more posts (or if you are not patient, then upgrade your account) to use R2R classifieds. Intent is so only trusted people are selling so its a protection for buyers.
Have you considered starting your build thread? I found its a great place to document my tank's evolution for myself. I started tank first then joined, so I'm still finding myself going back collecting pictures & updating historically as well as current state. Once you create your first post in your thread under Forum > Member Aquariums and link it to your account, they will give you build badge (look left, under my ID)
This might help you find people local to you in Omaha (and local hobbyists sites might be better - no shipping - option to consider):
https://www.reef2reef.com/forums/local-reef-club-discussion.516/
This is a good reference book type online article I still review:
https://www.reef2reef.com/ams/the-supreme-guide-to-setting-up-a-saltwater-reef-aquarium.84/