Now is a good time to think about running. If you want to run for president, the campaigning cycle starts in about a month. So, a week before it starts, maybe think about what you wanna do as president, start making offers and stuff like that.
But right now, you can try and find a VP and a HOC and maybe name your party.
Starting a party is hard, so I recommend just joining another party because it's a lot less stressful, but that's just my opinion. You can do what you want :)