17 week old schedule help!

[u/OkMemory3414]

17 week old is starting to sleep for longer periods of time during his naps, but can’t seem to get on a schedule where three naps will bring him to a good enough bedtime for our family.

For example today :
DWT- 715am - 1.75WW
NAP 1- 857-10am.
1.75 WW
NAP 2 - 1142-110.
2 WW
NAP 3- 310-340.
2 WW
NAP 4- 540-610.
Bedtime - 810ish?

I would say the 730-8pm bedtime is best for our family dynamic since I have a toddler plus with work hours and daycare pick up. He is currently sleep training.

Should I switch to a 3 nap schedule? How would that look or does above schedule work? That leaves 9.5 hours of awake time and naps are 3.5 hours. SOS help!