No need to post again--as said elsewhere. Don't start over, don't worry about levequests.

Keep doing your main story quest until you get to the level 50 ones. If you have a little gil to spare, you can buy level 50 whites for gear and a weapon (the low ilvl ones) and that will serve you until you start getting tomestones or gear drops. If you're short on cash, well, stick to your quests. You get bits of equipment from your class/job quests (make sure to finish those) and I think the story gives equipment here and there too.

Just keep at it and you'll get there ^^