Only once very briefly what I have to buy the lenses and why:
Sigma 30mm 2.8 - ideal immerdrauf with good intensity and expected to KB 45mm / Portrait Suitable
20-50 Kit - great for video
Walimex Fisheye II - interesting look - makes me the most fun
Sony 35 macro - guess what - for Macro shots
all very expensive lenses and for me the ideal start