Off to a good start The 2nd and 4th ones are my favorite so far, the expressions make it xD
I will offer a word of caution regarding speech bubble placement though! It's only an issue in the Soda strip's first panel, but the ordering of the bubbles is really confusing. Right now it looks like the black haired girl says all of her lines, then the blue girl says hers after, because you read from upper left to lower right. I found this quickly on google, but trying to physically layer the bubbles on top of each other in the right order like this might be useful next time:
Like the first bubble is clearly batman's line because it's at the top, then catwoman speaks, then batman, then catwoman finishes with her 2 bubbles.
Keep up the good work!