I'm not quite ready yet, but when I'm trying to tone up and gain muscle, do I eat enough calories to maintain my weight, or do I eat even more?
Ah, there are a few different opinions on this and some people will say it's impossible to gain muscle on a calorie deficit. Some people will talk about bulking and cutting. You don't need to do that.
You're gonna need to eat a bit more, especially protein, yes. For the kind of results you probably want, you probably don't have to worry too much about eating all that much more to gain.
I Recently googled "gain muscle on a calorie deficit" and read a couple things that popped up....very interesting ideas, there's a lot of conflicting ideas in the industry...
But basically if you're not a competitive bodybuilder, don't really worry about all that... just make sure your calories aren't too low, maybe get to body maintenance calories, or within 10%...listen to your body....and try to eat almost a gram of protein per pound of your bodyweight per day, especially on days you lift.