How do i first start off in the gym if i am obese and bigger girl😰💔

So i am so out of shape.. i havwnt worked out since it was 2019… before i had kids. In 2020 thats when i had my 1st and started to gained a TON OF WEIGHT. I am now 170…. When i walk i get tired … so imagine me running… 😩im scared . How do i take baby steps when i cant even walk ..: i wanna do cardio but im scaredddd