How can i take my self seriously without a good job ?

i have a job at taco bell, and i messed up a couple of times there, and i don't think it's for me and i get few hours, but i don't know when i am going to ge the job that i want in forklift driving, because i guess i am not qualified, but time passes by and no good job, and i ain't even so good at an easy job like taco bell, so how can i take myself serious i don't have kids or a wife, and i feel discourage. like maybe i'm no good. i hope somebody can relate to my problem and understand that if you have a good paying job you should be thankful.