Hey firat time dad.
I'm not a dad but me n my hubby just had our first baby too.
you might want to look into childbirth education classes at hospitals. It will be useful.few months into pregnancy and prepares you for labour n stuff.
And also how you can help to massage your wife cos she's gonna haw aches n pains.
Also lib books are gr8.
If you have a smartphone try downloading babycenter app. It's very useful n they hsve articles for dads too
Hope this helps