speed work

Ok so with the New Prague 1/2 marathon comming up in a week i thought I might try to do a little speed work. Man am I far away from where I would like to be. I did not feel super bad , just not in rythem like I would hope to feel. I did just a simple workout. 3 mile warm up, then 10 x 1min hard/ 1 in easy, then a 3 mile cool down. I got to get better right ?