At 25 you have more than enough time. You are 10 years younger than I am. Age-wise you have nothing to worry about.
Just make sure your pockets are deep enough
Many of the people who I have met during training have generally been in their early/mid 20's through to their early 40's. There are many people who have started their flying careers in their mid-30's and have achieved relatively high positions in their respective companies.
Best of luck.