I have had my license and I would say the best part of having a license is having the MLS. I have no idea how anyone would expect to do anything in real estate unless it is long term buy and hold with out having access to the MLS. If you can get the MLS, and you don't want to sell houses I would not get my license, at least to start out. The reason is you can find deals on the MLS. You can then structure them to your advantage by approaching the listing agent and using them as the buyers agent. This is advantageous because it is human nature to want to make more money on the deal and the listing agent will be making 6% so they will want to help you.
Then when you go to list a house you can use a discount broker, the guy I use only charges me ~$300 per deal. Most agents have to pay their brokers twice that.
It is a lot of time and energy to get a license that you can spend doing other things. But the key is you have to have access to the MLS or you are dead in the water.
The advantage to having your license when you are starting out is if you buy a house from the MLS, you can get that 3% commission back at the end. If you buy a $100,000 as an owner occupant, you will need to put down 3% to get the loan. If you get an FHA loan and put down 3% you get that back at closing in the form of a commission.
If you are wholesaling the advantage would be if you find a house that can go on the open market you could list it rather than wholesale. @Meghan McCallum is right, no one can tell you what will work best for you. Think it through then Jump, avoid "analysis paralysis" you can make money either way.