Skip the 30k shapton for now unless you get a bargain on a full kit.
It is a boat load of money and I doubt most will see the value.
If you skip the 30k or not do not skip the 1k and perhaps one slightly
coarser (500 grit). You will not use the 500 grit much but
if you need it you need it.
The Norton 4k/8k combo is a work horse and a lot of value for the
money but not the only choice. The norton 1000 grit works well when paired with
a large extra coarse DMT to keep it flat. A big DMT can be replaced with
a flat bit of steel or a granite tile and some 3M wet dry to lap on. Lapping
is often over done but has value.