Are you wanting eventually to work in a studio fulltime or freelance fulltime?
Either way like Aarlev has said its gonna be hard to get into a FT Creative agency, not just because of the current climate but most designers generate good and great pieces of work for their portfolio by being in a creative agency.
If you have not already, a good way to get a good portfolio is through education - university - college - night classes etc, i like many on here no doubt got my fist Junior role through my uni portfolio (and some free work experience work aswell).