The bright side of DC cantrips is that they completely ignore things like AC or advantage/disadvantage, so against hard-to-hit enemies it's just a matter of targeting their weakest save. I actually have a warlock concept who have a damage cantrip for each save just so I could avoid dealing with dodging abilities. But yeah, until I'm higher level you don't even need much of a bonus to beat a 13 or even 14 DC.