Step one
Fix the route once.
Pick somewhere you can walk in your head without thinking, and five stops is plenty to start. Same door, same order, every time, so you never have to remember "what came next" - the route does that part.
1 Hall - the door you walk through first
2 Kitchen - same counter, every time
3 Bath - nothing to invent, it's already there
4 Lounge - the couch you know by heart
5 Bedroom - the route's last stop
Step two
Park one image per stop.
The First Lesson turned twelve digits into one story: a LION ROARS and KICKS a BEACH BALL into LAVA. Split it into three scenes, one per stop, and the route keeps the order, so the next number gets the next three stops instead of a longer and wobblier story.
1Hall - a LION in the doorway, letting out a ROAR (52 44)
2Kitchen - a KICK sends BEACH sand across the counter (77 96)
3Bath - a BALL bobbing in a tub of LAVA (95 58)
Step three
Take the walk.
To recall, don't try to remember, just walk: through the door past the roaring LION, into the kitchen past the BEACH sand on the counter, into the bath past the BALL in the LAVA. The route never moves, so the order comes with it - 52 44 77 96 95 58.
1Hall LION ROARS52 44
→
2Kitchen KICK, BEACH77 96
→
3Bath BALL, LAVA95 58
52 44 77 96 95 58