Just ensure you get a class three hitch installed and a 2" ball.  I would also talk to someone who owns a 2 horse bumper pull and have them teach you how to pull horses in it.  You can not just "stop" a trailer or do fast starts, also you need to take corners slow.  What I did with my 4-H kid's parents that were new to horses, I would have them ride in the back of the trailer and I would drive down the road.  I would do the right way of driving and the wrong way, they got an idea of what a horse has to endure in a trailer.  I truly mean "endure".  You try standing upright in a moving vehicle at considerable rates of speed.

There is more than the issue of having "enough" truck, there is the proper driving of the horses, adjusting your driving techniques, how to compensate when the horses in the bumper pull get restless and the trailer sways from their movement.

Have fun shopping for a trailer, be sure to bring someone knowledgeable with you so that you can see the undersides, check for weak points, make sure the lights and brakes work (if you have an electrical brake controller installed), check the tires for dry rot, or bare spots, or uneven wear. 

It is exciting getting your first trailer!  Good luck and be sure to have fun! 

Don't be afraid to ask questions, the stupidest ones are the ones unasked!!!