Hiya. You should be fine to do that tune at that mileage. Mine is about about to tick over 180k and has been stage 2+ for about the last 40k. It was on stage 1 for about 10k before that.
As long as you’ve got no engine issues then you should be fine.
I’m guessing from your username that you’re in New Zealand. If so, are you in Auckland, as I can scan your car with VCDS to check it for you if you like?
Also, what tuning company are you thinking of using?