There are advantages and disadvantages to going young heavy. Their lack of experience being the major drawback but you only get experience from playing so, catch 22.
Varela and Triana look like great pieces to build your club around and any training I suspect is being done around those two.
I'm personally focused on Cash, Bo, Botero and Beer. All except Beer are going to [hopefully] be star forwards of the future, although Cash could end up as an off guard if he gets enough JR pops.
Just keep training and build your arena and things will work out sooner or later.