I singlehanded my scot all the time. I am on a lake and didn’t feel it necessary to mod it for single handing. I have a tiller extension and racing rig and find my jib sheets easy to manage and my vang is led aft. A few things I would say to you:
cockpit is not self bailing. If waves splash in you bail with a plastic cup.
i feel the scot is hard to tack in higher wind without the jib. I don’t think it’s a great boat to under main only.
so I’d look for a keelboat with self bailing cockpit and maybe not such A massive main for boat weight