If I may be so bold as to give you a quick tip for your lettering/speech bubbles. You should try to leave a bit of room between the bubbles and your characters, it makes it feel a bit claustrophobic if you don't. It doesn't need a lot, just a smidge to give both your character and your text a bit of breathing room.

I don't know how your process looks like, but I would advice to start out with your lettering/speech bubbles and draw your characters 2nd. This way you guarantee enough room per panel for your text and you won't have to bend your bubbles in uncomfortable shapes and sizes. 