Our club is nearing 50 years old... in the formative years when there were perhaps 20-24 members near half of them were crossing oceans in boats that today many wouldn't take across a large lake.
Yes it can be done.. today's sailors are not nearly as hardy a bunch, as a rule, as the 'old days' of wooden ships and iron sailors. Robin Graham did it in the 60s as a teenager, but most of the people tackling that trip will have had decades if not years of coastal sailing prior to making that leap.
From your own description of the 'space' you're in right now, I'd say you're a long way from ready... but there's always a 'but'......
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)