Help me find an alarm please

[LongGrain]

ok so iver never had to worry about anything happening to my car until now, i'm at college, where my car has to sit in a parking lot all the time (until i bring it home for the winter) well today the unthinkable happened, my car was broken into, they pulled apart my interior, but only stole my head unit, and all my disc golf discs. my doors werent locked (i know it was stupid) but my key is really really shitty, and barely starts my car, it doesnt work to open the doors, so i cant lock them. i just usually keep my steering wheel with me, which probably saved my ass from having a stolen car. but anyways, ive decided to get an alarm, but i dont know ANYTHING about electronics, can you guys help me pick an alarm. only real requirements are that it also has keyless entry (do they all?) so that i can lock and unlock my doors without my key. and also it cant be TOO expensive, but i want quality, so please help me!