You COULD, definently, but prepare to be gimped until around 6x - 7x...
The higher your Level, the more damage your nukes will do - this will be especially true, since at like, Level 30, since you're still STR-heavy, you'll be doing GAY damage with your nukes.
However, if you choose to go on, at around 72 or so, you should be back on track, and make a decent Hybrid. You'll be INT-heavy by then, so it'll work out in the end.
My suggestion, though, would just to be to restart. Won't take that long - you're only Level 25.
Good luck with whatever you pick!