Books will guide you, but Filipino (used to be Pilipino before 1982) is a little bit different from Tagalog but Filipino is derived from Tagalog. Filipino can mean it is the people living in the Philippines or the language. The differentiation was quite clear before 1982. Before then, Pilipino means the national language and Filipino is the general name for people living in the Philippines. Like other languages, there is a formal way and the colloquial way. The colloquial way is usually the Tagalog language but not always. The formal way is the Pilipino (I prefer to call our language that way to differentiate it from the people). It would help you more to memorize it in phrases. Like when sombody says "What's up" in English, they don't literally mean what is up directly above you but it means "What is new?". Like English, Pilipino has a lot of idiomatic expressions. Our language is somewhat different just like Japanese which have particles as a part of a sentence, in ours, these are linkers.
But even then, we really do appreciate your interest in trying to learn the language. Don't worry, we're just around.
Cheers!!! Tuss!!! Ta da!!! Ciao!!! Alors!!!