Nice. Though would feel more normal as a creature (a high preist?) I think.

brand new to making cards- should I just stick a 1/1 body on it without changing the cost, or what?

If it's a common, then probably. Unless half the set is about sacrificing creatures, then you're going to want to double up on the functionality of your cards, so there are less dead draft picks.

Uncommon or higher, I'd say it's fine. It's a nice effect, and, as a player, I'd rather have that nice effect stick around in the form of a hard to remove enchantment, then have the option to gain 2 life from a creature.

This negates the main drawback of my Savra edh. 10/10 would incorporate. I too think it might sit a little better on a creature at it's current cost and rarity.