Hey bud,
I have been taking Spanish classes since kindergarten, so I may be a little biased, but I'd say learn Spanish first. I have not studied French that much, but Spanish is quite straight forward. It's a phonetic language, meaning a word is almost always pronounced the way it is read and spelled, and there are absolute rules for stressing the correct syllable, which are only negated with the presence of an accented vowel. I attempt to present Spanish as the "easier" language because if you learn all the words and conjugations in the mode of Spanish first, you will have a larger archive of words that you can make connections to when learning similar languages in the future. Especially if you're learning French after this.
On the surface, Spanish seems to be very fundamentally different from English, but the deeper you dive into Spanish the more and more often you encounter cognates (words of two different languages that look similar and have similar definitions).
Hope you come to a decision soon!