You seem to have the armor for it. I did plenty of Bard Tanking leveling up to ~40 with worse gear than you. You could argue that I was a better tank than Pallies/SK since at that level range the defensive skills matter but not a *ton*.
What I did was pretty simple:
* Spam Snare songs (preferably AE snare) for 3 casts to lock in aggro.
* Twist Snare, Heal, and Group haste/combat buffs. If you're good enough throw in one of the defensive songs. If you have the Mana song twist that in (wasn't available for me when I was that level).
* If there is some CC issues, start with the snare spams on the main (to get aggro). Once aggro is attained twist in the Mez on adds and the snare. You can keep 3 reliably mezzed doing this while keeping aggro. If you only have 2 adds, twist in the heal. If there is 1 add, twist in the heal + Haste/Defense.
* For Casting mobs just spam Mez. You can keep casters stunlocked pretty easily this way.
* Don't use weapons unless your healer is doing a good job keeping you alive. The double heal from the regen song by using a lute makes a huge difference.
* Don't use Charm because it adds a crazy variable that if you screw up could kill you. Or if you're better than I was I guess you can try charming
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With you as a tank the only class that might dislike you are Druids (and maybe clerics). Shamans usually could heal me just fine. Clerics would just throw the small heals on me way more often than with a bigger tank (40+). Overall tho each time I did it I'd get compliments and the usual "god I love Bards that do more than swarm kite" which is always nice.