J24 Good first boat???
A J-24 in one piece for that price is incredible. While they have shortcomings the J-24 is an outstanding sailor.
Before you buy it however consider that it will always be small. That the "cabin" is a joke and unless you and your friend are slender and very young you will soon dislike it for overnights. The boat is a wet one for the sound. It can get rough out there when the wind blows. However it''s a lark to the young of heart.
That said I paid a lot more for my first keel boat, a 1972 Cal 25. You can always sell the J-24.
If it passes a survey without major work needed buy it.