Everybody copes with rejection differently but focus on the fact that rejection is an
inevitable part of this journey. I don't know anybody who got a TC first time. As cliche as it sounds, treat each rejection as a learning curve. Think 'okay, I didn't get through this time - why? Maybe it was the content or structure of my answers. Maybe I need to communicate the strengths of my work experience more clearly.' This should make it easier to bounce back from rejections.
Also, even as a lawyer, things aren't going to go your way. In a sense, think of it as prep for your future career, something that is only going to make you stronger