Hello and welcome to BcUK
Pull up a log and join the conversations around the virtual campfire
I have no idea what caused your onearmedness (not sure if that's a word, but it's descriptive) but I don't think you'll let it limit you
I saw a fellow make fire by friction using a firebow and he had only one arm too. He used a chest brace to hold the spindle
Very capable man he was, did a lot of fishing, hiking and such like. He just had to think outside the box a little harder than the rest of us
cheers,
Toddy