If you’re familiar with the major system, you don’t necessarily have to have a pre-defined list. You could even use other people’s lists and categories for the words. If you want to take Raja’s advice on sets of 10, (which is good advice), you need multiple categories per scene with a 2-digit setup.
You could try adjective-person-action-adjective-object to fill your 10 digit scenes, which would look something like this:
14 15 92 65 35 are the first 10 digits.
14 - adjective “DouR” (grumpy, serious, unfun")
15 - person “DoLLy” (dolly parton)
92 - action “PiNNing” (like a wrestler pinning something down on the floor)
65 - adjective “CHiLLy” (shivering, ice covered)
35 - object “MoLe” (the animal that digs undeground)
So the sentence to build your scene off of is “dour dolly pins a chilly mole”
Imagine a serious and grumpy dolly parton on the ground like a wrestler pinning down a freezing, icy mole that had popped up out of the ground.
Make that scene happen at your first locus in your memory palace.
9 more scenes / loci set up like that and you’ll have 100 in no time.
If you want to use my list as a reference for people actions adjectives and objects, here it is: