About creative finance contracts

[Sung Won Moon]

Hello guys, I'm a small business owner trying to break into real estate space. 

I'm very interested in seller financing or creative finance in general because I started my business only 5 months ago. And it seemed like the contract is what's really important to be convincing to sellers and to be safe. 

I just wanted to know how I can find the contracts. Since creative finance could have different situation every time, do I need to hire attorney to make adjustment? Any recommendation for starting investor? 

Any input would be appreciated!