for the OP's benefit, my advice .......
if you are taking your boat to sea, take as many ways of raising the alarm
as you have/can afford. As you are in a SIB I wouldnt expect your going
a long way from the shore ? in an area with no other boating traffic ?
If you have a mobile phone, get a waterproof bag for it and fasten it
to you, if you have 2 mobile phones - get 2 bags, get a waterproof VHF,
and attach it securely to yourself.....and as folks said here, get a course.
It boosts your confidence so much when you pass it.
Do as much as you can afford, and try to prioritise safety kit over toys for the boat.
There is a ton of advice on here about safety kit, its expensive but
worth every penny should you ever need it.