Im downloading the game now and i want to know what would be the best class right now? Ive played tons of MMO's and RPG's i just want to have a strong char to start with!

All classes have a roll in end game. If you like mage go blackmage if you like dps classes go either bard or Dragoon.

Start with Tank.

You will have 100,000% less downtime waiting on Duty Finder, and will almost always instantly get into dungeons. As compared to waiting 10m-1h on some classes trying to queue something up

or healer

If I could go back I would have started as a Tank or Healer.

The reason being is I personally liked to keep my leveling up with my story quest.

Once you get into your 20's you start doing a lot of dungeons as the main story quest. As a archer I had to sit in 30-60 minute que's.

Also here is a great guide to your hunting logs. Hunting logs are great xp and typically in the area of your main quest/side quests of you current level.

http://dimensionaldeath.com/index.php?page=huntinglogs

Also if your looking to level fast look into some fate farming guides. Honestly I would just play story / side quests to level 20. From there if you go to Quarymill you can fate farm from 20-30. (Make sure to join groups for best xp)