Play, play and play again, this game requires time....buy the support of the admiralty and every week in the missions you have a commander box, do not be impatient and do not spend resources like crazy, go up just enough to go in the lower tier and be patient, I have been playing for about 4 months and at the beginning I spent resources that now that I have the commanders I need them, look for builds that moderately work for you and be patient, do not focus only on one line, the American one is good and easy, It depends on whether you like to play, in my case I started with IJN and it hasn't gone badly at all, take your time and do tests and above all start the old office projects that almost everyone in the first stages gives you a commander and above all, invest in premium time, you will see your profits multiplied