Today lets’s look at the difference between “so” & “such”.
When using only an adjective（形容詞）to describe someone or something we use "so".
David is so tall.
Yuzuru Hanyu's routine was so amazing.
The Tigers were so disappointing.
Smartphones are so useful.
The party was so fantastic.
When we include the noun（名詞） to describe someone or something we use "such".
David is such a tall guy.
Yuzuru Hanyu performed such an amazing routine.
The Tigers season was such a disappointment. / The Tigers had such a disappointing season.
I had such a great time at the party.
Smartphones are such useful devices.
Sofia and Istanbul were such beautiful cities.
Risa and Takayuki are such good friends.
These are such lovely flowers.
To describe large amounts we can also use "so many" and "so much" with nouns.
There were so many cars on the road.
I drank so much water.
She didn't get so much sleep last night.
There will be so many fun things to do.
I hope that was helpful, and good luck with your studies!!