Islays are fine, might be too peaty for a new pallet.
This is why I always save Islay's for a separate introduction later on, if I'm helping a newcomer to scotch. Sure there's some folk that don't really like anything until they try an Islay, but lots more in my experience that take one sip of an Islay and nope out hard. Better to get a few unpeated offerings into them first, then bring out the big smoke.
I even have one friend I'm working on right now who swears he hates scotch, but likes other whiskies, because he bought a $90 bottle of scotch once and it was so bad he couldn't get past two sips and poured the whole bottle down the drain. Turns out his first foray into scotch was Laphroaig, lol. I've been pouring him Old Pulteney 12, Deantson Virgin Oak, Highland Park 10, etc whenever we hang out to slowly correct him into saying "I hate that scotch" instead of "I hate scotch".