English Planet

I'm not used to + (verb-ing)
Here you are using 'not used to' to inform someone that you are unfamiliar or uncomfortable with a topic at hand.

Here are some examples:

"I'm not used to talking English."
"I'm not used to studying so much."
"I'm not used to being around new people."
"I'm not used to talking in front of groups of people."
"I'm not used to having so much stress."
"I'm not used to traveling so much."
"I'm not used to working so early."
"I'm not used to having so much responsibility."
"I'm not used to drinking so much."

I want you to + (verb)I want you to' is telling someone that you have a desire or would like for them to do something.

Here are some examples:

"I want you to clean the dishes."
"I want you to come home right after school."
"I want you to call once you get there."
"I want you to explain yourself to me."
"I want you to educate me."

By using the word 'need' instead of 'want' you are expressing something that is required or wanted.

Here are some examples:

"I need you to study harder in school."
"I need you to stop and listen to me."
"I need you to greet our guests."
"I need you to introduce me to your family."
"I need to request a refund."

I'm here to + (verb)
You are informing someone that you are at a particular place to accomplish something.

Here are some examples:

"I'm here to apply for the job."
"I'm here to take a test."
"I'm here to receive my gift."
"I'm here to support all your decisions."
"I'm here to watch a movie."
"I'm here to work on your computer."
"I'm here to welcome you to the neighborhood."
"I'm here to raise awareness for cancer."
"I'm here to start the job."
"I'm here to receive the award."

I have something + (verb)