Upgare Ventura that was normally Installed to Sonoma or Sequoia

I have MBP 13-inch, 2017, Two Thunderbolt 3 ports, running latest Ventura (13.7.6). I want to update t to latest Sequoia or at least Sonoma in order to run latest XCode. Since it is officially unsupported, am looking at OCLP as a solution. I have two questions:
1. Will I face any issues with such upgrade? Never done it before,so wouldn't want to desstroy my machine

1. Can I upgrade current OS or I have to install it afresh? I would prefer patching and upgrading current one if it was possible

Thanks in advance!