Tuning for a Street Twin 900 (2017)

I want to decat my Street Twin but I also dont want to leave it untuned for the decat. Does anyone know any good DIY ways or companies to tune the ecu. I would prefer to tune it myself to reduce the cost but I also dont want to brick my ECU in the process. I put it into chatgpt and it gave me some good tuning numbers but I also dont know what tuning software to use. If anyone has info on this I would love to hear it if not thank you for your time.
note: everything else would be stock besides the decat for the tune.