1. Get more exercises and build up some muscles. You will lose a lot of sleep and need to hold baby so good health is essential. This is the most important advice I can give you. Two months is not much but whatever.
2. Mother is going to focus 100% on the baby at least in the beginning so you need to learn to take care of yourself. Make sure you know how to enjoy life with just yourself.
3. Learn to do chores efficiently. Learn to cook stews and other food that can easily cover a few days of needs. If you are a very tidy person, learn to lower the standard.
4. Know how to drive to the closest hospital plus the one for delivery. Practice at least twice to know the quirks in Google Map. You don't have much time if there is an emergency. Actually, try parking there for once and know the way to get to the delivery room. Hospitals are like mazes, you don't want to play a maze game at the time of delivery.
5. Be mentally prepared that your partner will ignore you for a while, maybe a long while (years). Know a bit about Postpartum Depression -- this can happen to men too! I'm pretty sure I have it and are getting worse.
6. Send the news to parents, friends and such. Ask if anyone is willing to help. Your parents usually would love to help but in case they are not available ask someone else. Some friends can spare toys and tools, don't be shy -- take them!
7. Buy baby bottle warmer, some size 0 and 1 diapers, formula milk, milk bottles, etc. My brain is not working very well after two years of lack of sleep so this list should be much longer. Oh btw buy a warm blanket for yourself if September is cool. Sleeping on sofa without a blanket makes one's back uncomfortable.
8. After the delivery, follow doctor's advice, not someone else's. Some culture may have their own ways to "treat" but most of them are not scientific.
9. Save the phone number of the hospital (of delivery) so that you can call easily during an emergency (e.g. blood clot coming out).
10. Good luck. Hopefully you enjoy fatherhood more than I do.