I completely agree with @Robert Leonard. I am currently in the process of getting my license right now, but it is costing me about $2500 by the time I am done....and that doesn't include the monthly fees (MLS, etc.) that I will be paying once I am licensed as well as the member dues to the national and local Realtor associations that I will pay yearly.
The difference between me and you right now is that I have excellent credit, I have a low debt to income ratio, I know where every penny goes in my monthly budget and I have cash reserves. If I didn't have all that, there is no way I would have gone for a RE license just yet.
You have got to get your own finances in order before you do anything with RE. Otherwise, you will get burned and will just give up. Trust me, I've done that already. Don't make my same mistake!
So, create a monthly budget and get your expenses lower than your income. Here is a tool from Dave Ramsey to help:
http://www.daveramsey.com/mobile/gzbudget/
Start paying off your debt and start saving.
Build up an emergency fund for yourself (6 to 8months livings expenses)
Then build up a fund for RE cash reserves. You are going to need it! (I spent $4,000 in repairs on my rental last year for an unexpected repair....it just happens and you need extra $ for that kind of stuff!)
While you get your own finances set right, you can continue to learn and learn and learn.
Then I would say, "Yes, getting your license can provide many benefits in your RE investing, although it isn't totally necessary to be successful."
Wishing you the best year ever!