I know of individuals whove successfully changed careers in their 30s.
In Australia, med schools have a significant proportion of mature age students who embark on their courses at your age or even older.

So at 26, with a range of skills, work & life experiences and personal insights, to an outside observer, you appear to be in a reasonably good position to decide what you want to do wrt your career and life.

Only you know what fields interest you and how much effort youre willing to invest, but if you do stay in your current job, IMO, it would be appropriate to let your supervisor know that you are keen for opportunities to expand your skill set. Job & financial security are very important, but at your age and from what you post about yourself, a position which is mentally rewarding as well seems to be indicated.