Hi [USER=19961]@SSmith[/USER]! First off, I have to commend you on the research and effort you've put in to making your decision- they show that you've carefully considered your options, and this is an ability that not everyone can boast about. I think George has directed you to some good resources, which is why I'll focus on responding to a different part of your question regarding your motivation for making apps.
While I studied Law with Politics at uni, I too was a career changer when I decided to apply for TCs and I believe I may have shared the same doubts that you have now.
What really helped me was ignoring all the background noise of the pressure to secure a TC by 2024/2025/20XX to validate my career change or the insecurity of not being part of the target applicant demographic and instead simply focusing on what my core motivations for wanting to become a commercial lawyer at a city firm were.
I began to reflect a lot on what I wanted for my life and career, what kind of person I wanted be, how I wanted to engage myself for 10+ hours a day, what had changed for me to go back to law- the list really was endless.
The end result of the period of time I spent reflecting, alongside prepping for making apps, was that my motivation to go through the gruelling process of making TC apps was stronger than ever, and this fuelled me through and through to keep trying, no matter how many times I faltered, till I got a TC at the firm I wanted.
I think you may benefit from taking some time to do this so that you go into your SQE course with clarity about whether this is the best route for you. Besides, with most firms having an even divide between non-law and law graduates, being a career changer from a non-law background should not be a hinderance at all in your choice to pursue a career in commercial law.
Wishing you the best, please do keep us in the loop about your application journey!