What you need next is a sample pack with a variety of different blades. After you figure out which blade you like best, buy 100 of them to knock down the price per blade. If you're buying other stuff from one of the online shaving shops, get their sampler pack. Otherwise, have a look at these:
Double Edge Samplers - https://www.razorbladesclub.com/double-edge-sampler/
Double Edge Samplers - https://www.razorbladesclub.com/double-edge-sampler/