To say "I want to take a shower" in Engpsh, you can say "I want to take a shower." The pronunciation is:

"aɪ wɑːnt tə teɪk ə ʃaʊər"

Here is a breakdown of the pronunciation:

"I" is pronounced "aɪ" as in "by" or "my."
"want" is pronounced "wɑːnt" as in "want" or "font."
"to" is pronounced "tə" as in "to" or "do."
"take" is pronounced "teɪk" as in "take" or "cake."
"a" is pronounced "ə" as in "a" or "about."
"shower" is pronounced "ʃaʊər" as in "shower" or "tower."

Note that the word "shower" can also be pronounced as "ʃaʊə" in British Engpsh.