How can I start eating meat again?

I've been a vegetarian for about four years. I am now sixteen. I had to get blood work done last week. It came back in and I found out my iron is dangerously low. I have to go to the hospital for something. I was taking high ml grams of iron pills but they weren't helping. I want to start eating meat again. I figured it was the healthy choice. It's gonna kill me. I became one as a choice. I didn't really like the taste of meat when I was young, and killing them so I could eat them hurt me. I need to think of myself though. Does anyone have any tips to help me starting eating meat again?