How do you protect a commander with low power/toughness?

I’m wanting to build a deck around [[Arabella, Abandoned Doll]] but I’m afraid her small 1/3 is going to be an issue. Since she has to attack to trigger her effect there’s a high chance she’ll be destroyed by a defending player.

Has anyone come up with a decent solution? Arabella is only 2 mana out of the gate so in theory is not hard to just cast her again with the commander tax, so there’s a start.

EDIT: thanks everyone for the responses, I’ll try to answer as many as I can individually. MTG is new to me and I’m stoked to learn all of this.