I agree with Keith’s knots etc., but I’m a bit anxious about the link (pun) between the genoa halyard and you needing to be rescued. The rope tail at the bottom end of the genoa halyard (it is this rope that you mean, is it?) is only there to allow you to pull the wire part out of the mast when you go to rig the boat (a bit like the bits of string electricians use to pull cable through floors, except more permanent). Once the genoa is hoisted and tensioned (perhaps with Highfield lever or muscle box?) the rope tail isn’t meant to take any load at all – it’s just coiled and neatly stowed. It should be the wire loop that you hook onto whatever device you use to obtain/keep tension in the halyard.
You may very well know all this already, but I would hate anyone reading this to be unclear about the role of the rope tail and get into difficulties as a consequence. If you were to use the rope as a load-bearing part of the halyard the wire would cut through the rope in no time…
I would encourage you to come to any of the UKWA organised training events if you feel at all uncertain about any aspect of your setup or sailing ability. The tidal training in September might be of interest to you?