God has always desired for us to cross over into our land of promise but from the perspective of helping others. We are to cross over into our promise as a armed fighting force ahead of our brethren to help them.
We are called to build up the body of Christ until WE ALL have reached maturity in the knowledge of God.
your mighty men of valor shall pass on before your brethren [of the
other tribes] armed, and help them [possess their land] Until the Lord gives your brethren rest, as He has given you, and they also possess the land the Lord your God is giving them.
So why are you trying to walk in the land of promise?