What kind of handgun should I get if I have long fingers

sighauer 9 mm with a manual hammer

Any kind, it will still work, long fingers and all!

baretta 92F

One that feels comfortable for you

Perhaps a bow and arrow are more your forte having long fingers.
Perhaps you may want to be cupid, God of Love.

l have that problem (my hand will span an octave and two) and most anything with a double stack magazine fits OK. l can not seem to get along with single stack (like 1911 Colt's) because of my long fingers. l am currently carring a Sprinfield Armory double wide 1911

unless you are some circus freak or Edward Sissorshands . just about all hanguns will ''fit'' a wide range of hands and finger lengths.
Go gun shopping. grip the ones you like . see how they point for you.

Handguns feel different to everyone so every shoot has preferences. Find yours.

Happy shooting

It is not the hand gun, it is the grip. Find a handgun that you like and change the grip. l used pack myer grips on several of my handguns for comfort and control especially for the larger calibers. Just make sure that what ever hand gun you choose that you can change the grip. Good luck.

You may feel most comfortable with any automatic with a double stack magazine--Beretta 92F/M9 is a good choice in 9mm, so is the high capacity ParaOrdnance .45 ACP.

You can probably make most medium and large frame revolvers work for you too--just change to grips with a covered back strap for greater reach. Smith and Wesson K-L or N frame guns with Pachmayer grips might fit you well.

Go to the range, rent some guns and try before you buy.