Can a 14 Year Old Start A Newsletter?

I'm 14 and there's not many ways for me to make money. I've tried dog walking and pet sitting but no one needs a pet sitter or dog walker where I live. Since I still need money, I was wondering if I could start a horse newsletter to send to local barns for a subscription of $10 a month that will go out every two weeks and will include training tips, a Q&A section, advertisements, etc. Do you think this is a good idea? Is the rate per month too high? Anymore ideas for the newsletter? Please tell me your ideas as I need money very badly to help pay for lessons!