Tagalog is an interesting language because it seems like a simple language, but from my experience it’s fairly complex. As was said before, complexity is subjective.
Tagalog does not have tense, it has temporal aspect (Verbs either have begun, have finished, or are contemplated).
Verbs also have triggers. This means that whatever noun is the trigger, it influences the conjugation of the verb. Triggers are: directional, beneficial, locative, object, actor, instrumental, and goal. These are either suffixes, or prefixes, and there’s at least one infix. In order to indicate temporal aspect, phonetic changes are used to produce it, which changes the initial consonant of a trigger affix, changes the initial consonant and reduplicates the first syllable of the root, infixes the trigger affix between the initial consonant and vowel of the root word, etc. (it’s fairly hard to explain).
There are no articles at all. There are trigger markers. and these attach to whatever noun is the trigger (as stated above). Non trigger nouns get another marker which marks it as not the trigger.
Prounouns are fairly simple, however there is an exclusive and an inclusive “we” (Including you and the listener and others (inclusive), or including you, and everyone else but the listener (exclusive)). There’s also a pronoun which exclusively includes you and the listener (kita).
Adjectives are most of the time neatly marked by a prefix indicating they are adjectives “maganda” - beautiful.
Nouns are probably the trickiest part because there are many many affixes which create nouns from roots. These affixes are suffixes, prefixes, infixes, or circumfixes.
Stress is extremely important because it differentiates words with similar semantics but spelled (in latin orthography) the same:
The word kaibigan means depending on stress:
ka-i-BI-gan - friend
ka-i-bi-GAN - desire
KA-i-bi-GAN - mutual consent
ka-I-bi-gan - sweet heart
however written Tagalog NEVER uses ANY accents (this drove me up the wall learning it), unless it’s a foreign word already spelled with the accents on it.
Simple pronunciation is easy, but words can have many syllables, and some have several vowels in one line (separated by glottal stops):
maaari - ma-a-a-ri (that’s four syllables, not two)
There’s probably more but i forget.
Anyway, Tagalog is also notable because it’s one of the more conservative Austronesian languages (along with the Taiwan languages). The whole trigger system of the verbs is considered archaic. As you move south and east the languages simplify their verbs, but compensate by being difficult in other ways.