For me, my Bosmer Nightblades are the easiest to play.
That said, Bosmer and Khajiit are pretty similar but for someone without CPs to dump into stamina regen I think Bosmer is likely a bit easier to play for a first character due to their racial regen but it's not a night/day thing.
Use Dual Wield, take Flurry, Morph to Bloodthirst and health rarely becomes an issue; DPS will be a bit lower but frankly for leveling you'll be hard to notice and once you get other healing skills then you can respec to min/max DPS is you like.