I'm currently in a photography class this semester and I'm starting getting into mirrorless cameras, so I'm wondering which one I should purchase in the future. Right now I'm using a Sony Alpha a6300 which I'm renting from my university, and I've heard it is a very good mirroless starter, but I'm curious about other brands like Olympus and Fujifilm since I'm only familiar with Canon, Nikon, and now Sony.
Another thing I'm looking forward to is Panasonic's S series of cameras, which was just announced during the start of my semester. I'm very interested in the promises of better image stability and low-light settings, but I feel like it would release too late into the 2nd semester for me to start using one. This goes the same for Olympus which has been rumored to have similar benefits in hardware compared to Panasonic's 2019 line up.
So my real question is this: Should I go ahead and purchase a mirrorless camera now so that I won't have to rent another one for next semester, or should I wait for the 2019 line-up for their improved performance? Also, which brand should I go with based off of their features and overall quality, and which brand overs "semi-universal" lenses? From what I've learned, all I know is that Sigma offers lenses than can be used on Canon, Sony, and their own cameras.