I felt the same way when I had about 400 hours. I just wanted to get hired. I will tell you that when I got hired, I still felt uncomfortable with 1100 hours in the sim. You need to go in there and be Instrument proficient! And not just Instrument proficient but be able to do it on one engine with flashers going off in your face trying to remember call outs and profiles. Sometimes you cant teach that stuff its just experience. I know that with 400 hours I had know bussiness in an airline cockpit. I thought I did. I would have never passed with 400tt. I am not saying that it doesnt happen, but where I went it doesnt happen very often with out washing out. I know that now and it sucks for the lower time guys, but you do not want a 121 bust on your record. Keep flying and getting experience. Just my 2 cents. Good Luck.