You will get a lot of different types of responses to this thread. I will try and give you a few things to think about.
1. You say you don't want to get an expensive cue now and run the risk of ruining it. If you buy a quality cue and do your best to take care of it, there is little risk of ruining it. Don't throw it like a javelin, don't twirl it around like a movie star, keep it in a decent case when you are not using it, don't leave it in a vehicle, don't loan it to a friend, etc. I am not saying you need to raise your budget, I'm just suggesting you change your thinking about how a decent cue that is not mistreated should hold up.
2. You can buy a low end Viking or a low end Joss, or a host of other low end production cues used for around $100 to start with.
3. Find one that is straight, and follow number 1 above so it stays straight.
4. Around 19.5 ounces is a good weight for your first cue.
5. For a smaller investment, I recommend a dufferin, a schmelke, or a Players for around $60, but these would best be looked over and inspected in person.
6. Get one made of wood. Don't buy a cue with a plastic looking butt, don't buy a cue with a fiberglass coated shaft, etc.
7. If you can visually inspect a supply and hand pick, find one that feels good to you while in your hands, and has a good looking shaft. Good looking shaft means one with a decent number of grain lines that run as far as possible in the shaft without disappearing out the side of the shaft. Start at the joint end, find the center grain line, and see if you can trace it all the way to the tip (you might not find any like this, but pick one that has the grain lines that are parallel and run as far as possible). That shaft would have good potential for playing well.
8. If possible, see if you can make a few test hits with a few different production cues to see what sort of feels good to you so when you buy something online you are not terribly disappointed if it feels foreign.
Great to hear you love the game, and I hope the club you want to start at your school does well.
Kelly