Hi Glitch,
Yes, I have been interested in learning Tagalog since my first visit to the Philippines 44 years ago. With a total of 36 years of marriage to Filipinas, and living and working over there for a time, I managed to pick up a lot of vocabulary and common phrases mostly by listening and imitating.
Tagalog is a moderately difficult language for native English speakers to master, but if you have a very good grasp of the English language, then you shouldn’t have too difficult a time learning. I have been told that it generally takes about 7 years of serious effort for the average person to become conversational, but having the opportunity to practice by using it daily would be invaluable.
Keep in mind that there are something like 170 distinct languages spoken in the Philippines but Tagalog is the primary language, along with English. Most Filipinos here in the States will use Tagalog as a common language, along with English, to communicate with each other. Neither of my two Filipina wives were native Tagalog speakers, but they use Tagalog when speaking with other Filipinos over here in the U.S.
Tagalog (or Filipino) is taught in schools in the Philippines, but English is the primary instructional language.
Everyone has his/her own preferred method of learning so there is no right or wrong way to go about learning Tagalog. Even with a decent vocabulary knowledge, my big problem was pronunciation. I have noticed that most Americans who attempt to speak some Tagalog mispronounce a hell of a lot of words and make a lot of mistakes in usage and grammar.
What helped me immensely was taking some formal Tagalog courses at the local community college. I got to use Tagalog in practical situations with immediate feedback on any pronunciation errors. I recently completed a total of 15 semester hours of formal Tagalog instruction at a very reasonable cost.
There are all sorts of Tagalog language programs available, including computer programs, on-line learning aids, college or university courses, etc… The Philippine government had a nice looking on-line Tagalog language program offered through the CFO about a year ago, but it looks like it is no longer available through their Web site. It was geared primarily toward English-speaking Americans and other western country citizens of Filipino decent. They only charged USD $20 per semester but maybe they dropped it due to lack of participation.
I think the method you are using is an excellent way to start to learn the language. I would strongly suggest that you insist that your lady friend be very strict in correcting your pronunciation, or you will have problems being understood.
Also, try to find a good English-Tagalog-English dictionary with all the accent marks on the Tagalog words to aid in pronunciation. I have a really good one that I purchased many years ago in a bookstore in the Philippines, but I don’t think it is published anymore. Most of the dictionaries I have found here in the States, and even the ones in the Philippines, are sadly lacking.
If you become really serious at some point about learning the language, then I highly recommend some formal training in a school setting if it is available in your area. Studying the grammar, verb usage, and keying on proper pronunciation I feel is invaluable. Most formal courses also include valuable instruction in the Filipino culture and history.
Ray