There are many competitors in this field. To start, you need to have a good marketing budget.
You can start a bounty and signature campaign on Bitcointalk for your project.
Yes starting a signature campaign on this forum is a better way to advertise here. If it is a gambling casino then that will be amazing and it will attract more users to the platform. Bounty is also a good alternative but it's mostly used for new cryptocurrency project that is just launching or looking for users and large followers. Op can also create an ann thread that will be use as an info centre.