Now what

So I got the job... part-time (no tuition/free schooling benefits)... Not sure how I feel. On one hand, it will be a great asset on my resume, and a great view inside the world that I hope to work in someday, but on the other hand, I have a full time job, with full time hours and this would be another 10-15 hours tacked on at the end of the day (2-3 hours a day, 4-5 days a week), and my poor dog will be all alone for those hours, plus the commuting time. AND, in the winter, when it gets dark at like 3:30pm, how will I even walk my dog!? Ugh. Now I am torn. This seems like a much bigger commitment than they led on, and with this position being in its rookie year, there are a lot of unknowns... The pay is not stellar, so I would be doing it for the experience... Is it really worth it? I mean with gas prices alone, and driving in rush hour 4 times a day (to and from my full time job 6am-2:30pm, and then two and from my evening job 4pm-6pm), it's almost more of a hassle than a great opportunity.... 5 days a week!? That seems like a lot of driving. Ugh. Now what?