Well it sounds like your conditions are good, and your soil is good (personally I go heavier on perlite but it's not super twitchy as long as you don't see signs of soil swamp, lol) and all that.
You will be ready to start on nutes any time now. Like now even. But start out lightly, at half strength.
Keep an eye on that pH and make sure it doesn't go any higher, or give it a check after you mix your plant food. 7 is a little up there but if I am not mistaken that black gold is below 7 so no worries.