My advice to beginners is to dont even attempt to brew without having a wort chiller. I never realized how long these things can hold temp without an external help. My first brew I got my boil done and was like "uhhhh". I live on a lake, so I set my boil kettle like submerged like 3/4 of the way to cool it down. Luckily it was a cold November day (I believe it was Thanksgiving weekend) and the water was about 38 degrees. So it wasnt a bad idea for my options. Took about 2 and a half hours to get to pitching temp. Beer ended up, very, very good (american wheat extract kit I got with my original setup) despite this however.
Next brew, I was more prepared. Got an ice bath ready in a tub. I had 2 huge bags of ice, and about 8 gallons of water I submerged it almost completely in.
20 minutes later, all the ice was melted, and the temp had only dropped about 50 degrees (it was in the 130 range). Still took an hour and 15 minutes to get to pitching temp.
3rd brew: Threw $60 for a wort chiller I'll have forever, took me 12 minutes to get to pitching temp.
BOOOM.
That second brew I will say, was a lager and it was pretty amazing, nevertheless.