
Jing
The thoughtful listener
The question may contain two fears: that change is no longer possible, and that attempting it will expose how much time you wish you had used differently. The second can make the first seem more convincing.
There may be real constraints. Training takes time; responsibilities and some career pathways impose limits. Those deserve specific information, rather than a blanket verdict delivered by your age. Ask what this particular transition requires and what parts of your experience remain useful.
You do not have to feel pleased about the timing. Regret can accompany a worthwhile decision without proving that the decision is pointless. Nor must a new beginning repair every disappointment that came before it.
Consider a first step small enough to test the possibility. The useful question is less whether you are late for an ideal life than whether this change could improve the life you actually have.
Find a perspective 
