CaeciliusIstInAtrium Welcome! Eevee's are so common that you really don't want to putting candy and stardust into any evolutions that aren't going to be worth it.
So although it may have good IVs, with low CP, it would take too much dust and candy to power up.
I would suggest not powering it up and waiting for a better one to come along (which they will do, as Eevee's are thankfully not rare!).
As you're a relatively new player, I would definitely recommend saving up stardust and candy in general anyway.
A lot of new players don't realise how rare stardust is and make the mistake of using it freely; it should only be used on your best fighters or defenders (Dragonite, Blissey, Snorlax, Gyarados, Tyrannitar etc). Don't get me wrong, this can definitely include Vaporeon, Jolteon and Flareon, but I would suggest only high CP, good IV ones 