Birth Control Pill

So I have a boyfriend in the military and its a for sure thing we will get married when I see him in the next few months. I'm a virgin and I want to get on The pill now so my body will start getting used to it....  Does it matter what brand I use? Any side effects I could get from using the pill? I plan on also switching to  inplanon implant birth control after I marry him. 
I'm a little lost and obviously new to all this so any advice you girls can give me would be appreciated!! Thank you 😁😁😁