this year was my first year in here. vs this year was my first year at here.

Some examples from the web:

• That was my first year in Homicide.
• It was my first year teaching school.
• No. '68 was my first year reporting.
• He was a 23-year-old first-year officer.
• Today's the end of my first year in Trauma.
• I was just telling Grayson here about my first year in spirit squad.
• I was a first year student last year.
• My first year in the priesthood, I met a young single mother named Claudia.
• From my first year in middle school on, I was a regular and I held a ticket to the Koshien in my hand.
• I haven't defended a case of dereliction of duty since my first year in JAG.
• My first year in, I didn't think I could make it, so I got a bunch of pills from the other inmates.
• During my first year in prison I befriended this guy
• My name is Will McKenzie and my first year in state education has been an unqualified success.
• Mr President, this is my first year in the European Parliament and I have been struck during the course of this budget debate by the contrast between rhetoric and delivery.
• Rita was my first friend here.
• This eight hour trade gives me the money I need to pay my way through art college, when most of my first year was devoted to the fundamentals of still life.
• It was my first college paper in years.
• Eight years ago today was my first summer here at camp.
• That was my first cigarette in ten years.
• So nine years ago, Joseph was my first appendectomy patient.

Some examples from the web:

• That was my first year in Homicide.
• It was my first year teaching school.
• No. '68 was my first year reporting.
• He was a 23-year-old first-year officer.
• I was absolutely miserable my first year at university.
• Tried it my first year at Brown.
• It must have been my first year at the university...
• I'm in my first year at Adams Community College.
• I'm in my first year at the institute.
• I started writing in my first year at university in Tehran.
• I was a first year student last year.
• My first year at art college was boring to say the least.
• I remember when Susie Crabtree dumped me back in my first year at the Academy.
• Seems like just yesterday my dad picked me up after my first year at college.
• And my first year at Caltech, I continued the business.
• So the following episode happened the seventh week of my first semester of my first year at Yale Law School.
• Rita was my first friend here.
• My first year at junior, all right, my coach... he takes me out for a beer after practice and he tells me, Todd, there are two ways you get into the NHL.
• This eight hour trade gives me the money I need to pay my way through art college, when most of my first year was devoted to the fundamentals of still life.
• It was my first college paper in years.