New bike and now I'm one of THOSE guys

My little apartment room is full of bikes and bike parts now, no room for anything else but the bed. When I crashed my Nishiki and researching how much it would cost to repair, I went to my local bike charity for advice. I thought Id just take a peek at the bikes for sale there to kill time... And calling to me from the far top rack was a 2002 (i think) team blue Cannondale r800, and in my size at 60cm, carbon fork, Shimano 105 groupset.. Ive never ridden a modern road bike, only old mountain bikes and 80s steel downtube shifters. Never touched brifters. So I asked to test ride it and holy fuck. Felt like driving a sports car after only driven clunkers. Lightes bike id ever ridden, acceleration like nothing id ridden before. Despite early alluminums reputation the ride was actually less harsh than my steel Nishiki, more nimble and grippy in corners. Buuuutt at $250 dollars was more than I was looking to spend, Im very poor and all my bikes are older used deals I scour for So after a short joyfull ride of a couple miles I brought it back. The manager asked how I liked it and I gushed that despite its age was the most bike id ever biked and was a pleasure, but that I was mostly looking to fix my Nishiki for $100 or less. He smiled and in a low voice asked if a hundred dollar discount would be doable. And it was. Stunned I forked over 150 while they lubed and adjusted it, and I road home last night and now over 10 miles on my new Cannondale. Downside is 25c wheels and there miiiiight be room for 28c at least on one end, but 25 may be max for the rear. Also zero attachment points for racks, fenders, none at all. Reccomendations on sturdy racks for bikes that cant rack would be appreciated if you read this far. I want to prepare it for some light touring/bikepacking, obviously not on truly rough terrain.