How to show a lender that you are able to do business ?

[David Reyes]

Hello every one how are you on this beautiful day/night ?
Hope you are doing awesome !!

So here is my question, Iam working on my business plan and most in the part of financing....
I am working and saving money for my first conventional loan (20% down) but I REALLY WANT TO LEARN AND WORK in how to get more deals with creative financing 

So here is my question....

If getting a loan with a private lender or portfolio lender or commercial loan...
How do I get in front of them and show that I am serius about my investing career ? Being a young guy 23 years old with not to much credit record on my side has being kind of hard for me to get that

I talk a month ago with a BP member wich help me a lot but still having trouble
What to show this people to get the yes on this lenders for RENTALS ?

Any idea will be more than welcome 
THANK YOU EVERYONE !!