[Morith]

If building apps were that easy, they would be built like websites through something like Word Press. But since this is not easy, you either need to figure it out on your own for a long time, or enroll in courses and gain the necessary knowledge, or look for specialists and order application development from them. From the top app development companies, guys from https://gyre.pro/ who developed applications for YouTube.
Here they really know their stuff.