This is a matter of time and money. The most profitable at the moment to invest these resources in the work on the project. Advertising and promotion will be relevant at a later stage.
There are different development strategies. You can aggressively recruit a large number of users or you can develop gradually. The first way is more expensive and requires a good investment in marketing.
45 percent of the collected money is intended for advertising, I think that these funds will be more than enough to promote the project.