You will need a chainsaw hood, they come with eye protection and ear defenders attached, I have been using chainsaws for 20+ years and done all the chainsaw courses and would never use a chainsaw without them, of course the other essentials are ballistic trousers (or chaps) and ballistic boots.
People think that cutting logs with a chainsaw is simple, I can assure you it is one of the more dangerous things to do with a chainsaw, logs are loose and will move around. Just remember that a chainsaw with go through a human leg in approximately 2 seconds! and incorrect use will see the tip of the saw embedded in the forehead, especially on the small chainsaws.
I have seen some dreadful accidents with chainsaws many years ago when I was a tree surgeon. Get all the right gear and do a course on how to use a chainsaw.