About general beginner training for type 1a or in the context of the Bulgarian System I am not sure, however in regards to the basic principles I’d say it’s safe to assume the same would apply as what the Conjugate / Westside system would recommend.
That is, a beginner should hammer the accessories to build up GPP and to build muscle that they can use once they transfer into heavier training phases, as I heard Dave Tate say a few times ‘you can’t flex bone’.
With that in mind, provided someone can make sure their form is sound and safe, a beginner still could work in the range of 3-5 reps using an accumulation phase like approach with the Westside system, where the max effort days are 3-5RMs, for beginners just heavy efforts not RMs, and the speed days are 15-20 speed sets of 1/2/3 for deadlift /squat /bench, with around 30% 1RM, instead of the conventional 8-12 speed sets with ~45-55%+bands/chains. Again, % won’t do much for a beginner so I’d say pick weights that are really easy to handle and use them for speed and form development.
Now a complete beginner who can’t bench say 135, the bar would be well over 30%, so either a smaller bar would be useful, or even using a repetition effort day in place of the speed days to build strength endurance and muscle, and transfer to speed days as they advance.
This is just in the context of the Conjugate / Westside System, but the basic principles apply to most programs. Heavy but not maximal 3-5 on the main lifts with the right person keeping an eye on their form, coupled with light technique work and smart assistance work that increases in volume and intensity slowly overtime (keeping in mind that even little stimulation goes a long way for a newbie).
If you keep these principles in mind then most programs can be made beneficial to a beginner, and you can easily mix in certain specific neurotype requirements as well.