There is absolutely nothing wrong with consuming carbs. Pretty much all grains, fruit, tubers, and legumes can be part of a healthy diet. People who say otherwise are usually part of the keto crowd who ignore all evidence that shows these things are totally fine to eat. No, you will not “mess up” by eating quinoa. IMO your main focus should be in consuming whole foods that aren’t extremely processed and are, in general, low in sugar and saturated fats, watching your calorie intake, consuming vegetables and a good amount of fiber, while getting a good amount of protein from lean sources (animal or plant is mostly irrelevant from what I’ve seen, as long as you consume adequate amounts to support physical activity, ~1g/lb of lean BW). And this doesn’t mean you can’t consume sugar or saturated fats, but I’d keep an eye on those and do so in moderation.