Seeking roles during notice period

I took the plunge people, left my job after a few consecutive quarters of passive aggressive kpi meets and non existent growth/revenue opportunities. And a few incidents which led me to definitively value my peace of mind and work life balance over the salary. Now I'm in my notice period and don't have a job yet so the blues have gripped me hard and I can't focus on job apps as much as I have to. I have 13 years of exp, 5 of which are in building b2b and b2c products as product manager but I'm facing fairly crippling imposter syndrome with each non response from prospective employers. Looking for some tips and suggestions on how to navigate this better. I'm definitely way more skilled at doing the job rather than finding the job, fingers crossed. Will appreciate any and all pointers please