Well, I'd start at the beginning, then. I'm not sure your team is actually balanced enough to make it easy on you, so if you're looking into seriously doing gyms, you might want to raise or catch a few more!
Basically, the gyms start out easier and get harder, level-wise. And skill-wise, a bit. The first gym is a flying-type one, and while Galvantula is partly electric, it's also partly bug, so I wouldn't rely on it too much there...but water-types aren't particularly effective or ineffective, either. Electric, Ice, or Rock types are the most effective there.
video;
Well, I'd start at the beginning, then. I'm not sure your team is actually balanced enough to make it easy on you, so if you're looking into seriously doing gyms, you might want to raise or catch a few more!
Basically, the gyms start out easier and get harder, level-wise. And skill-wise, a bit. The first gym is a flying-type one, and while Galvantula is partly electric, it's also partly bug, so I wouldn't rely on it too much there...but water-types aren't particularly effective or ineffective, either. Electric, Ice, or Rock types are the most effective there.