[HELP] Thread

Hey. I've been learning C++ for quite a while, but only just got into game development with it. I'm using SFML along side. My goal is to try and develop a game like Faster than Light, where you build a ship, customize it. It would have Birdseye view, again like FTL. My main question is, how would I do it? I understand SFML basically and I'm still learning. I know this is an extremely open question and any feedback would be appreciated.

Thanks in advance...

im no expert with 2D programming or one man game programming but personally i would do it in this order:

1)main systems like health and shields (not be useable at first)
2)placeholders that allow you to see you program
3)add basic weapons
4)add upgrades
5)work on AI
6) add the galaxy into the game
7) work on UI
get someone to test you will find alot went wrong
9) fix any bugs you have with the game
10)make better textures for the game
11)spend about 2 month looking over code for places you can improve/change or add things
12)when you are happy and tester stop finding issues release it

as i said im no expert and i never try anything like this im a unity scripter but if i was to try thats how i would do it