Just do an introduction and gather your thoughts on what you would find valuable for this and what areas you'd like to and/or be able to contribute. 

You just have to network and be someone who comes from contribution and it will turn up.

There is no way to decrease it by allocating/contributing it to the LLC or by investing anywhere else. 

I am looking forward to being apart of the BiggerPockets community with contributing and as well as learning about the commercial real estate and investment industry.

Contributing your respective properties into one multiple member LLC changes the ownership from individuals to a partnership for tax purposes and your "seasoning" or "holding" period really starts all over again in order to demonstrate the the LLC (partnership) had the intent to hold for investment purposes.  

Their whole thing is basically, they’ll fund 100% of the deal through this “find-fund-flip” and all you must contribute is the 3k in the beginning, and then $600 every deal from their out and as long as it’s 70%arv they’ll fund the entirety of the flipSounds to good to be true but I wanted opinions just incase it wasn’t too good to be true

@Shelby WillittsYou are correct that the contribution limits between a SIMPLE IRA and a Traditional differ.  

So you and your uncle inherit the property, and he immediately conveys his half to you so you can then turn around and contribute the entire property to your LLC?

To that end, I anticipate it will be easier to begin to set up the corporate structure now and learn how to navigate and operate it since it will likely be more complicated in the future - get the system in place while it's still simple.Second, I want to begin to contribute assets and build a profit/loss history with my LLC (business). 

Find a good mentor or team to work with, learn the ropes, contribute to the team and you'll be miles ahead!