There are websites that can swap between simplified and traditional Chinese characters

in my experience learning characters I needed to learn how to write them, starting from basic strokes - there are some good videos on youtube, you have to be patient, this takes a long time

for traditional characters and Taiwan dialect you’d want to learn bopomofo and not pinyin, for the reasons other people raised. From what I have seen bopomofo would also help learning the basic strokes and some radicals

i found a podcast called Dimsum Pinyin really really helpful for training my ears to tones, and pinyin in general, but there are likely better resources from ROC. There’s probably a lot out of ROC, if you look for ‘comprehensible input’ videos itll help.

hanping dictionary app and pleco dictionary were really helpful when i started, they both have paid features showing stroke order for characters

Ive seen people say you dont need to learn hanzi, but it’s not only fun, it’s really helped me remember words. If I hear a phrase and can identify the characters, it’s much easier to remember what it means. the character for cat, 猫 mao, is a radical for dog 犭quan, grass 艹 cao, and field 田 tian

anyway, rambling while i procrastinate, good luck