It is important to keep trying. Not everybody will make it first time, I did not when applying for Tax Professional Training, but I was put on a reserve list and called up later. Many do not make it first time but they do make it second time round. The process for recruitment can be long, but do not get disheartened, this is to give everybody the best chance of being accepted. If you can, get feedback and consider it for future applications. Feedback will often point our your weak area that can easily be improved with a bit of practice. If you do get on a training programme, be aware that though tough, they want you to succeed and will do everything they can to support you in achieving the end goal. Do say if you need extra support, they cannot provide it unless you tell them you need it. I am dyslexic and they took this into account for exams providing computer rather than writing and also extra time for reading.

Try different areas. Don't stick to one

You will bring a unique perspective to a role as your experience will have been different from that of others. Don't be afraid to bring that to the fore, it is what makes you, you and brings a valuable contribution to a team. I wish I'd thought this more when I first joined the Civil Service!