First of all, whats important is your preference to what kind of jobs you like. you said you wanted to be a summoner? That is a fun job and definately one worth getting.
I suggest reading this guide here:
http://nasomi.com/wiki/doku.php?id=new:first-timespecifically the jobs section. For summoner, as long as you don't mind asking for hel pin order to get your summons early on, its pretty friendly and fun to learn. If you go summoner, a big recommendation is starting as black mage, then when you get the subjob quest done switch to white mage, and then when you reach lvl 30 get summoner. This is because white mage is the subjob of summoner and black mage is the subjob of white mage. This way you can also recycl most of your equipment from blm into your whm without too much issue.
As for your specific question, like infi said, almost any job is okay to start with. But the ones that aren't recommended unless you are willing to do a big extra effort are Ninja, Ranger and Corsair, this because they cost a LOT of money because of their bullets/tools.