Is the 6 your Gleason or PSA score, and what's the other one?
With your current diagnosis, you probably don't need to do anything in a hurry. You could take Active Surveillance for 3 months, and see how you handle it mentally, and also see how quickly your PSA is changing (should be PSA tests every 3 months in the first year on AS), assuming your PSA is raised in the first place. You could also use the time to learn more about prostatectomy and how it might impact you. While on Active Surveillance, you have the right to change to active treatment at any point.
Active surveillance is not entirely risk-free - sometimes there's more significant cancer than they found, and occasionally this leads to it spreading elsewhere, but the chance of this happening in 3-6 months is quite low.
Do you have any additional risk factors, such as being a Black African or Caribbean man, or having a father or brother with prostate cancer? I would factor those in to the decision too if so. Also, the percentage/size of tumour and location in the prostate (e.g. near the edge?) would be things to factor in too, which you haven't mentioned.