I’m not completely sure what resistors come with the kit, but I would be surprised if there where no 4k7 resistors - and you can try other values between 2k and 10k too (or two 10k parallel will give you a 5k).
Whey you say you only found that didn’t really help, have you seen these
e.g.
DS18B20 Dallas Temperature readings jumping high at random intervals
DS18B20 is throwing -127C from time to time
Getting correct address of DS18B20
or any of the other threads dealing with DS18B20 (search box top left)
About the wiring you could look here
https://github.com/tomdeboer/SparkCoreDallasTemperature (online library for Particle Build/Web IDE)
https://docs.particle.io/assets/datasheets/makerkit/DS18B20.pdf (datasheet linked in the Maker Kit docs)