Most reasonable thinking Wobblinbrush!, as good a place as any to start.As already said the shorter the length of "head" or "belly" you will be casting the easier you'll find it all to get going, so short or medium belly Spey Profile lines won't be a bad place to start.
I'd say this however, look to the rod in the 1st instance, pick one of a suitable length and strength for where you'll be doing most of your fishing, then look for advice on a line to match it that will work well subsequently.
I see your angle about wanting to learn with a full- albeit shorter head- Spey line, but the reality is it will be easier to get going with what you're terming a Scandinavian Shooting Head set up in the 1st instance, for a couple of reasons.
1stly, the length and weight of a "Shooting Head" will be tailored far closer to what a rod of a set length and weight will be at optimum casting with-even out of the box!.
2,ndly, you will be casting the same set weight and length of line every single time- no variation- so you will "tune in" a lot easier to how it all feels and how the line loads up the rod etc. etc.
3,rdly like as not that length of line will be shorter too, what you don't want as a rank beginner is a long length of line as it'll be too much of a handful for you and more likely to be affected by inclement winds or restrictive banksides, never mind the ability to handle longer lengths of line in the 1st place.
Now, it'll be a close call either way, a short headed full line will only be a bit longer than a shooting head, but!, you may eventually want to move on from it as you improve, a shooting head set up only needs one spool and backing etc, but you'll be able to utilise differing sink rates or indeed types of head to suit as you improve at far less cost..
As a Guide, for a full line the Barrio ISS (Integrated Short Spey) is a cracker, cheap and it will do exactly what it says on the tin and will help you up the ladder of casting a lot quicker, a close call between one of those and any reasonable shooting head set up.
Best of luck with your quest and tight lines, Pedro.