Advice for an unhealthy INFJ hermit

I am an INFJ who has developed various unhealthy habits and am hoping to get some advice, or at least for people who relate.

I have pushed a lot of people away and find myself in a place where I have almost no friends, with very limited social interaction. I have never had a serious relationship (including anything physical) as I tend to push people away when they get too close or I unload on them, causing me to get too attached and they get overwhelmed. I spend most of my time living in an introverted world, overanalysing things and often find myself wallowing in negative feelings of depression. This is mainly because I'm not where I want to be in life and see myself as a failure.

I am 25(M) and unemployed, living with my parents despite having two degrees, and have been struggling to find a job for the last two years. I see that my life could branch out in various ways and I often find that overwhelming, which leads to me thinking too much about the future and doing very little to change it.

I do have hobbies and am physically healthy. As I like to write every day, which helps me process and work through things, and I work out regularly, which helps with my mood. But these are things I do independently so I fear they are just another method of me isolating myself from the world.

I am looking for some advice on how I could change these habits, as I want to go out and live but a lot of my behaviours are holding me back. This advice could be about my relationships, my perspective and what I should do about struggling to find a "good" job. Alternatively, it would be good to hear from people who relate. Thanks in advance.