Find the c orrect category and add using suggestions button. Sorry no shortcuts. It can take from a few dyas to afew years for a review for a possible listing. Sorry too, DMOZ does not inform if a site is accepted or rejected. You have done all you can when you have suggested a site to promote it at DMOZ, do that and then go and promote it elsewhere, oh and don't re-submit. That can disadvantage the site up to being banned for spamming the directory.
Thank you, before I have submit a site, but so far the site has not been accepted. Maybe in this way, can make my other sites accepted.