As a recent Dad myself (Mine is just over 6 months) it's a really fun time.
Your priorities will change, you will hanker for the freedom of before, but it soon goes away when you spend time with the little one
The first few weeks will be the toughest though, man up through those and support your lady as much as you can. She will probably be an emotional wreck (wether she shows it or not!) I took 4 weeks off at the start to try and share the load as much as possible. Its very hard physically and emotionally but you will get through it and the bond of all three of you will be very strong!