Learning Tagalog is most beneficial if you want to understand untranslatable aspects of the culture (which often times requires being immersed and surrounded by Tagalog speakers for a long time - aka living in the Philippines or really being into the pop media culture ), but learning for the sake of your partner being Filipino won't really advantage you.
@Bituingmaykinang
Oy! I have to disagree there.
The process of learning and studying the language will help you get a deeper insight into the Filipino people and culture, and IMO that will also help you related to and with your wife.
...Speaking as someone celebrating my 5th wedding anniversary this weekend with a Filipina!
Also, it’s satisfying to learn something new, and fun to use when you visit the Philippines.
I wouldn’t discourage people from learning the language so quickly, we all have our own reasons!