Its actually decently close, but a touch off. Off enough that you’ll definitely sound like an American trying to speak Japanese, and if you’re actually in Japan, they may not recognize a few of these. The numbers are good aside from 6 (Roku) and 10 (needs a y in it, like jyew). Ohio is also hilariously accurate enough.
In Japanese, R and L are the same, and it sounds a bit like making both sounds at the same time (its done by trilling the R, a little bit lik rolling an R). In this document, they use L, but you’ll probably have an easier time being understood using R. (Key ray instrad of key lay, Airy got toe).