Listening to your instincts, while being the easiest, can also be the hardest thing to do.
Most of what I've learnt is too personal or controversial to share, but nevertheless, experiences have helped me understand things better and have been necessary for what my journey in future will be.
The biggest challenge is to not be affected by praise because a lot of it is not from the heart. Being true to yourself about your strengths and weaknesses, when everyone out there has a strong opinion and wants to give advice, is another challenge.
Stay positive and happy. Work hard and don't give up hope. Be open to criticism and keep learning. Surround yourself with happy, warm and genuine people.