Consider pixiv. You don't need to understand japanese and you can tag your drawings by checking similar works and translating their tags.
Posting it here is also a good idea.
Deviantart and tumblr are flooded with crap and I don't think you could be banned or your work deleted no matter how "bad" you think it is. Maybe you're just afraid of criticism, but if you're not willing to take it constructively, you won't improve your art. Just sayin'...