proud of you butterballs for trying out therapy, dude. its not always an easy step. i dont think therapy and medication are mutually exclusive, and as a random guy on the internet I would encourage you to try both at the same time. fwiw, talk therapy (especially Cognitive Behavioral Therapy among others) is incredibly helpful in doing exactly that: rewiring your brain to move away from all the ingrained negative associations.
There is a tight cycle between thoughts, feelings, and actions. In addition to anti-depressants making me feel better on the daily (e.g. less trouble getting out of bed in the morning), CBT helped me with stopping this cycle at thoughts. If I think I am a failure, imposter, or just a horrible fellow human, it taught me to insert "hey, what if I'm not a horrible person? what about all these little things and times where i made others and myself happy?" before i start feeling that way, and prevent actions that arise from them.
After all those years of self-loathing and perceived inadequacy, my social anxiety and depression wiring is still there, and I wouldn't call myself "cured." However, it is undeniable that it feels great to have an active role in stopping those cycles too. Realizing this direct connection and giving your mind some power over your feelings and actions is, redundantly, incredibly empowering.
And finally: No, sorry, haven't seen a career counselor lol. Wishing you the best tho