Your net worth is increasing $42,845 per year, and you have created the economic habits to repeat this process as many times as you want. 

Study for 1-3 weeks depending on your determination/study habits and you'll be fine.

@Craig GarrowI would look online at sites like Nerd Wallet that can help you find the best card based on your goals and spending habits.  

I would use the credit score to determine paying habits & then ask for vet references for their pet.

If you don't have these skills work with a good accountant  or financial planner to help you set up good money management systems and habits.

As Steven Covey refers to it in 7 Habits of Highly Successful People.

You'll be far ahead of the game if you can learn good financial habits now. honestly my advice skip the wholesaling thing all together and buy something that cash flows longterm by the time your in your early 20s if you start learning good financial habits now. 

Have a bad habit of doing just that.

Do some research and pick a card that is right for your spending habits (and that you qualify for).

I got into this habit by attempting to contact celebrities and famous business people for advice.What is it costing you—financially, emotionally, and physically—to postpone action?