It is not necessarily a process but it's practicing being positive, see yourself in a positive way. It won't happen over night. You will have to make it a habit that when you wake up for example you say some positive affirmations to yourself and about yourself, repeat the process at noon and at night before bad. Make sure you are consistent as well. It gets to a point where by your brain is now used ( you will start saying it with you even realizing it that's how deep those affirmations must be rooted in you) and you start manifesting it in the physical, You become what you say to yourself. I am not sure if you have heard this famous saying " the power of the tongue" . When a problem or a challenge comes do not see it as a challenge or a problem but instead as a take it as an opportunity to learn. I'm sure we have all experienced a point when a challenge came and we didn't know what to do, or how to handle it but as time went on everything was solved mysteriously and you even forgot about it after many sleepless nights of worrying and stressing .
When such a situation happens again it is important to not beat yourself about it. Start telling yourself that everything is going to be alright and everything is going to be solved. In conclusion I would say once we start training our minds in this positive and light channel we can tackle some of the mental health issues we are facing today.