Huh. What about one step at a time? I think a job is much, much lower stakes and so a good place to start. Finding out after the fact you weren't ready for a job is disappointing. Finding out after the fact that you weren't ready for a kid can be absolutely disastrous.

Do you think you you think you want a kid or is it more that you didn't like being told "never" about it? What can you offer a child? Safety? Consistency? Stability? Unconditional love? Kids are really, really hard and they need you practically all the time for many, many years. You need a deep well of strength, patience and kindness plus an ability to put yourself second for a long time. Ideally you also have outside support like people who can babysit, be there for you when you're at wits end and love your kid. It helps a lot to be financially stable and have a good stable partner with whom you have a strong relationship.

Also kids destabilize you emotionally. You are stressed and sleep deprived and often pushed and irritated to your limit. You won't handle it perfectly but you need to be able to respond with patience and empathy most of the time and not be abusive any of the time.

I could go on and on. Your T mostly needs to let you make your own choices and mistakes and let the chips fall where they may. But having kids is different. Your T has a responsibility to your hypothetical kids. S/he needs to tell you if s/he doesn't think you're parent material at the moment. The stakes are too high to just let you muddle through it.