The way it works, is they usually only give someone a $500 limit, then double the limit every 6 months If you pay monthly.
Once you get a job you can get a bump to $2000 limit with the 1.5% back easy. You just need to get a job for that.
I'm 1.5 years out of college and have access to ~100k in credit cards with a score of 750. I started with a score of 540 1.5 years ago. It's really not hard at all.