Here are some first lines by good stylists.
There were crimson roses on the bench; they looked like splashes of blood. Good first sentence, very striking with the unexpected imagery of blood juxtaposed with the roses
The judge was an old man; so old he seemed to have outlived time and change and death. I find this second sentence a bit of a non sequitur from the first, except for the word judge, which has an association with bench. The legal diction, added to the blood, makes me think crime story. I'd read on to find out who is being tried for what. Strong Poison, Dorothy Sayers
Farrell arrived in Avicenna no idea where this place is, so adds nothing to the scene setting. could be fantasy for all I know at four-thirty in the morning, driving a very old Volkswagen bus named Madam Schumann-Heink. this grounds me better, because now I know it is probably contemporary. but still don't know where Avicenna is The rain had just stopped. Two blocks from the freeway now I know this is set in America, on Gonzales, assume this is a street name, but I don't like all the unfamiliar proper nouns piling up he pulled to the curb and leaned his elbows on the steering wheel. The Folk of the Air, Peter S. Beagle It hasn't hooked me, or thrown me out yet. I'd give it til the bottom of the page
The row of comconsole this compound word tripped me up immediately. tells me it's probably sci fi booths lining the passenger concourse of Escbar's largest orbital transfer station that was a godawful mouthful of a modifying phrase - i'd stop there had mirrored doors, divided into diagonal sections by rainbow-colored lines of lights. Doubtless someone's idea of decor. Mirror Dance, Lois McMaster Bujold The first two sentences were a slog to get through. I probably wouldn't have made it to the third, but it wasn't enough to redeem the first two anyway
"Lymond is back." oh noes! starting with unattributed dialogue!
It was known oh noes! passive voice! lol soon after the Sea-Cutter reached Scotland from Campvere with an illicit cargo and a man she should not have carried.
"Lymond is in Scotland." The Game of Kings, Dorothy Dunnett
eh... this one was kinda meh for me. I'd give it to the end of the page to see if this 'Lymond' was worth finding out more about
The island of Gont, a single mountain that lifts its peak a mile above the storm-racked Northeast Sea, missing comma - if this occurred in the book, i'd stop there is a land famous for wizards. From the towns in its high valleys and its port on the dark narrow bays many a Gontishman has gone forth to serve the Lords of the Archipeligo in their cities as wizard or mage bluh. another long ass sentence that could do with some punctuation. The writing is actively kicking me out of this one... A Wizard of Earthsea, Ursula Le Guinn
Are these beginnings ... 'Jumping right in?' 'Hooking the reader?' 'Starting with action?'
Maybe. But what I think these first lines mainly do is tell the reader -- "I can write. I won't jar you with stupid mistakes. well, that just shows how subjective taste is, because I found stylistic and technical 'faults' with most of them that would make me dubious about the quality of the writing I won't sound like the last hundred books you opened. Trust me. Keep reading."