i have some questions, any help is appreciated ^^

Lesson on Ligatures
www.tagalog.com/less ons/lesson.php?lesso n_id=55&csid=104The job of the linkers '-ng' and 'na' are to connect two elements in a sentence: the modifier and the modified element. The modifier and modified element can include noun/noun, adjective/noun, and adverb/verb pairs. When the modifier ends in a vowel or the letter 'n', you will connect '-ng' to the end of the modifier; if the modifier ends in a consonant, you will link the two elements with 'na'.
Also keep in mind the order of the two elements doesn't matter, as long as they follow the '-ng' vs. 'na' rule.For example:
Puting aso OR Asong puti (White Dog)
Malaking bahay OR Bahay na malaki (Big House)
Mabilis akong kumain OR Kumain ako nang mabilis (I ate quickly)Lesson on Numbers
www.tagalog.com/less ons/lesson.php?lesso n_id=57&csid=123This website has a very useful section for helping you learn the numbers as well. Personally, I found that learning the numbers mostly comes down to practice and memorization. Also keep in mind for the hundreds and beyond, as linkers are also used.If you need me to clear up something, just let me know! And feel free to add on or correct me if I've made a mistake, it's all a part of the learning experience .

Yes, between variations in use of the linker and sound changes when combining roots and affixes, the Filipino/Tagalog numbers seem to be wildly irregular but there is method to the madness. Also, in addition to the 2 lessons that Loper referenced, take a look at Tagalog Sound Changes when Combining Roots and Affixes.
learningtagalog.com/ grammar/forming_and_ connecting_words/sou nd_changes_when
And, a post regarding the formation of "tens"
tagalog.com/msg/m.ph p?p=25689&m=25703labing + isa => labing-isa (note the use of a hypen before a leading vowel, also with apat and anim)
labing + dalawa => labindalawa
labing + pito => labimpito
dalawa + -ng + pu => dalawa + m + pu = dalawampu
tatlo + -ng + pu => tatlu + m + pu = tatlumpu
anim + na + pu => animnapu

@Loper tysm ^^ !!