don't worry bout smell.. in many cases that just means you are doing everything well.. a stressed plant stinks more.. some genetics just stink more.. it'll smell later, don't worry.
beside a total stab in the dark, you need some magnification of about ~30-60x to see trichomes and judge how cloudy/opaque they are. some strains have nuances to this, but you'll want some turning amber at the least and many say 30-50%, like it 10-20%, and i'd consider that per clone i grow.. and adjust to test what a little longer feels like. that's something for you to experiment on and choose what you like. it's a matter of a few days, really.
But, the magnification and watching the trichomes develop the last couple weeks will create familiarity and get you in the ballpark... the rest is personal preference.