The battery in my car is fucked and needs to be replaced. How easy is it to change it yourself? I haven't done much stuff on cars but I'm not afraid of DIY stuff.
The battery looks like it is very accessible and that all it takes is to unscrew a few bolts.
To add on to what's already been said, make sure to clean the connectors while you're at it, there should be no rust or dirt. The poles on new batteries should usually be scrubbed with a wire brush or steel wool before connecting it, to clean dirt or any corrosion