Hi, all. First post here. Thanks for all help in advance.

I'm in a situation where I need to commute to work everyday on what I believe is a 2004 Specialized Hard Rock Sport (bought used a few years ago).

I am newish to cycling in general, and have never commuted daily or had any of the equipment necessary for that.

Would anyone help me please?
I'm pretty sure I want a rear rack, bag that can attach to it, and some fenders. We have four seasons where I live and I figure that the above equipment is a minimum to get me going.

My head is spinning a bit after looking at all the choices I have when it comes to which rack/bag/ fenders to buy.

Will anyone familiar with a mid-2000s Specialized Hard Rock tell me which specific accessory brands will fit on my bike?

My goals are simply: 1) needs to fit. 2) inexpensive.

Thanks!