3 km and counting

So I started today. On my way to running 5km! I started at 9 am and ran 3km, my legs are killing me now, but I guess I shouldn’t complain. I’m actually really excited about the hope that Ill be able to run 5 km before snowfall so I can train all winter for a 10km race in the spring. I really just want to wear a bib and cross a finish line. Trust me I know I wont be WINNING any races, I just want to be in one. That's not too much to expect is it?