Some ups and downs.
*Left-handed guitars are harder to find, and will often be more expensive, and with less choice.
*If you learn to play left-handed, any chance you have to play a mate's guitar will be thwarted.
*Changing strings round to make a lefty will work - but it'll need intonating again, and the body of a cutaway guitar may not work to your advantage.
*Your left hand MAY work well on a standard guitar - it's more finger dexterity than hand/arm, and your left hand fingers are already more independent than your right.
*Playing a right-handed guitar upside down with no string change may work for some - at least the bottom string is at the bottom !!
*Potential teachers MAY try to discourage most of this !
*Working from tab may confuse you - it's generally written for standard.
*If it's electric, the pots, jack socket and wangy bar MAY get in the way - although a certain Jimi didn't find it an encumbrance.
*On record are plenty of left handed players who play standard with no problems. Don't know of any vice versas.
*Having given it due consideration (if anybody else has, please let me know), earlier 'open' chords are more tricky playing it 'upside down', but standard barre chords are quite achievable, so option 2 could be a mixed bag.