I can usually get it in 4 or 5 or by the time I reach the last chance at 6, but sometimes there are so many choices that you run out of lines. I sometimes get it in three if I strike lucky with the first two lines. People who get it often in the first or second line must either have amazing vocabularies and analytical abilities, are psychic, or have seen the answer on Google.
I start off with a (different each time) word that mostly contains the letters that appear most frequently in the English laguage (e, t, a, i, o, n, s, h, r.) but also include a less frequent letter, as I imagine that they try hard to bamboozle us. I avoid using a letter twice in the first line, so as not to wasting a chance of a yellow. There are lists of comparative frequencies of the different letters to be found online, if you can be bothered.
When I have a few letters, I try out test arrangements of them, working my way through the alphabet with possibilities for the gaps, and without pressing enter until I hit on a likely candidate. It is sheer chance whether it is right.