Slightly apprehensive, but determined. What would the feeling word(s) be for that.
Stubborn - I can relate to how you word it but would remove 'slightly' when referring to myself. To me that might be type difference.
The only way I've found to deal with weaknesses was to assimilate them. Once I could see them as a part of myself, and usually found they served some previously unknown purpose, they were well on the way to becoming strengths. Cutting some part away rarely makes anything stronger.