So, they have been living in our property that we have to make payments on and have only given us a security deposit and three months of rent for 8 months being in there.

You want to be able to secure a property under contract and assign it to your buyers safely.Small, Low-Risk Deals: Start with small deals to gain experience.

Positive CF is the #1 security blanket for overleveraging.2 - Having as large a Line of Credit (NOT connected in any way to any property...this is important). 

At least in Florida, all you need to get a real estate license is to be 18 years of age, have a high school degree or equivalency, a social security number, pass a background check (murders are not allowed, embezzlement is frowned upon as are sexual offenses against children and elders; most other offenses require 'extensive review'), and pass a licensing exam that prepares the newbie for nothing - and the pass rate is 46%. 

If none do, that may be a signal about timing or capital stack rather than sourcing method.

Are there also groups within LinkedIn that I could join or is there some other method of finding investors on LinkedIn? 

Make sure you are abiding by the state and local laws for security despots, and pulling comps for rents is the best thing to tell you that you are too high, too low, or just right. 

And Good Luck collecting any back rent or damages above the Security Deposit.

College Students and Graduates Enter the MarketSpring and summer bring:Graduating students seeking their first rentalStudents securing housing for fallYoung professionals moving closer to new jobsThis demographic tends to move quickly and apply early, especially for smaller homes, ADUs, and multigenerational setups.5.

One caution from experience, don’t get hypnotized by labels and “secret methods.”