I think if you are careful you'll get use to a cut throat pretty quickly so long as you pre-scrub, use shaving foam and most importantly use a sharp edge.
Don't bother with a £50 proper razor and get a disposable to start. Cheep and cheerful. I started on that and went on to buy myself quite a nice one and didn't use it for a while because keeping a honed blade was a bit of effort at the start. Keeping a straight edge honed is harder than the actual shave as a beginner imo, as they rarely ever come shave ready and require some taking it to a sanding block and then finishing on the strop when you first get them, with the odd touch up on the strop every few shaves. Whether you go disposable or not, a bit of Johnsons babyoil on the blade after use stops it rusting after your done with it.
I've never used a double edge safety razor, so i can't comment on that. I will say that no electric razor has come close to the clean shave i get from any manual razor and that i would choose a sharp, cheap disposable blade over a poorly maintained blade any day. A blunt blades make for much harder shaves with far more cuts. I use my razor mainly to maintain a clean neck and sharp, defined line around my jaw.