IMHO you've separated, filed for divorce, and cut contact--there's nothing ethically wrong with dating anytime. I would be honest about how long you've been separated and that your divorce is in progress. I had sex quickly upon splitting and the first wasn't great sex but it was therapeutic. I began seriously dating after 3 months, and I'd say I got really successful after 6 months with dating, love, and sex--had three women fighting over me! After a short spell, it was so easy and effortless compared to my ex-wife. Dates were impressed I wrote full sentences, dressed nicely, brought them flowers, and went for the kiss.
