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In article ,
says...

Sorry but I think your hands will give you trouble. Sailing involves a lot
of pulling as hard as you can on ropes. You need to be able to grip hard,
or wrap the rope around your hand and pull.

I can't agree with the last bit. Wrapping a rope around your hand is risky
and should not be done. You must
always be able to let go in an emergency.
If the rope pulls back your hand can become trapped in a block or similar
and give you a serious injury. Don't do it, or if you do, don't complain
when you get hurt.

No way I can pull enough tension on the mainsheet without doing this.
Class rules only allow a 5:1 system. I wind the sheet around one hand
and partially stand up so my thighs do most of the work. The other hand
is occupied steering.

Ditto for many control systems on most boats I've sailed e.g. heaving on
outhaul or kicker on boats where you cannot winch them on.