I play guitar and am going to start singing as well in my band. I don't really have any idea about what singing gear I'm gonna need for band practice, so was wondering if I could get some advice on cheapish gear which will allow me to be heard over guitars and drums?

I'm probably going to get a shure sm58 mic so what would be a good option to amplify this.? Would an acoustic amp do the job or would I need speakers?