If you are strong for your size, then you are strong enough, period. And you can always get stronger with appropriate training. Moreover, strength is only one component of being a good thrower; technique is equally, if not more, important.
Sometimes I accidentally rip towels when I'm drying my back.

Finally, why are you waiting until October? Find a game next month, and several more in between now and October. If you look around there may be a practice group in your area who will welcome your participation. Just ask and you will receive help. Throwers are like that, trust me.
Because that's when the next game in my area is. My work schedule is pretty tight, so I can't really go on road trips on the weekends.

My massage therapist is 5' and this year, while winning her weight class, came second overall in the Maritime provinces power lifting championship. She is what I would call fit and fabulous.
Awesome!