Well, you have to do a lot of proud thinking. Understand that your primary belief system is something you host. Understand that people can hold conflicting mutually exclusive beliefs and still operate normally. Understand that you can too. It’s possible for you to hold multiple entire discrete belief systems and to load them into your awareness like applications in an OS. It’s possible to understand that some belief systems are more optimal for some situations and that you can adopt the optimal belief system when required. There are many scenarios where solipsism is the optimal belief system. Once you understand how your mind hosts belief systems and you understand your primary plus some alternatives including solipsism… You can choose to believe that nothing is real, and that nothing exists. You can reduce the value of everything that is external to zero. You can believe there are zero consequences. There is only you. Only you are real and all value is you. All else is nothing. In this frame of mind you can do incredible things. You can act without hesitation or doubt, without fear or panic.