@Charles M. my group is investing in ATL and closing on a 284 unit prop in Stone Mountain tomorrow. As @Joseph Gozlan the best ways to "partner" is to bring solid off-market deals and/or equity. Most experienced syndicators have a network of brokers that send them deals off market or early access however the more the merrier.
Becoming a passive investor will give you access to the inner workings of the process and the sponsors. This however assumes you have at least 50K to invest (typical minimum) and are an accredited investor/sophisticated investor depending on the requirements of the sponsor.
Additionally, my advice would be to think of any way you could provide value FIRST. Think of what you can give before what you're going to get. If your goal is to work with someone experienced think about what they would want in their position. What would they gain by "partnering" with you if they already have all the pieces of the puzzle? Ask what they spend most of their time on or their bottle neck in their deal process and how you can help alleviate that step. Your main goal early on is to educate yourself if you have no experience. Offer to be an "intern" before you think to "partner."
Good luck!