You wouldn't be the first and won't be the last. People may tease you, but you can fix that by destroying them in races and group rides. Then tell them you did it in your granny gear because you need practice spinning.
I make fun of my teammates all the time for using compact cranks. This offseason, I switched to a compact and love it. I still tease them, I don't think they've noticed mine yet
Have fun and don't be in a rush to upgrade. There may be a local team you can join that will help with equipment, training, etc. Sometimes they even have donor bikes you can use as you get bigger.