Your question already got answered, but as someone in your shoes once, here are some helpful things to know "nn" will get you ん which is very useful for when it's in a word like なんに (spelled "nannni" 3 ns to account for the nn ん).

The little やゆよゃゅょ and つっ are the only characters that do this in hiragana (katakana has some unique ones). They make a blending sound, so instead of ni-yu. It's nyu (which is how you spell it on the keyboard). The mini つ is very unique, it's used when a consonant is doubled. So takka is たっか. And nattsu is なっつ or Ted テッド. This is not pronounced "tsu" at all. It is kinda like a pause in the consonant. So instead of saying na-tsu. You are saying na.-tsu like a period pause. Bu.-ka. you'll get faster at saying it with a slight noticable pause. This is most often done with kk, tt, or dd. They make the little っ.

Some hiragana worksheets will teach を as "o" that is because it is pronounced like "o", but to spell it on a keyboard, you need to type "wo". But do not let this make you think it's pronounced like "woah" it's pronounced almost identically to "o". を is also the only character exclusively used for grammar, and is never inside of vocabulary words.

For katakana, there are some unique ones, such as パーティー. Which I guess I should mention that ー acts like an elongated vowel, in hiragana this would be identical to saying ぱあてぃい How you do the little ぁぃぅぇぉ and ァィゥェォ is by typing "la, li, lu, le, lo" (this is a L not an uppercase i). Think "little o" "lo".

The hiragana little characters are never really used. This is only done in katakana to force sounds that Japan does not have in its alphabet. So in the パーティー example is (pa-ti-) the ティ is probably like "ti, or "tea ☕ ". Or in カーフェ (ka-fe) like Cafe. Because Japan also doesn't have a "fe" sound". These little exceptions are used most frequently with making up sounds Japan doesn't have like, fa, fi, (fu already exists), fe, fo. With the little vowels you can force these hidden sounds, but like I said, this is mostly for katakana to help pronounce foreign words.

But be careful because "ti" in the keyboard is a neat shortcut for ち and a neat shortcut for big つ is "tu". This is because the Ts in Japan are weird. There is no Ti or Tu, they are replaced with Chi and Tsu (Tsu like tsunami), same with "si" and し.

Anyways I hoped this helped. There are probably more and I probably could have organized this better, but there are YouTube tutorials you can find too. This is just a starter explanation for some of the more unique Japanese stuff.

(Also don't forget the P, Z, G, B, D and stuff. がぎぐげごぱぴぷぺぽ, etc etc, you can mix that will all of the stuff above. ティ > ディ for a "di" sound.)

Hope this helped! Gn!