I sail my H16 solo quite often, and normally sail with the jib unless the conditions are particulaly bad. Fortunately for me, our club has safety boat cover so if I go over and can't get it back upright, I know there's someone to help out if needed. Also I make sure that I know I will be OK in the event of a capsize, so I make sure that I'm reasonably close to our safety cover.
It's substantially more difficult to get the boat back upright after a capsize with only one person, so I suggest that to make sure you would be OK, before sailing off into the blue yonder, you do a trial capsize near the shore where there is help and see if you can right the boat yourself. If you can't then don't go out solo!
If I sail unirig, then I use a loop of rope as an extension and using the jib halyard, tension up as normal. This at least keeps you pointing a bit higher. This also makes sure that there is sufficient tension in the system so that the mast is not banging around.
If you can sail a 14 and tack, then you can sail a 16 and tack. It's just remembering the basics.