The reason why I386 is no longer supported by modern Linux distro's, is because the Linux kernel has dropped support for 32-bit CPU's. About the only thing you can do, is run an older distro of Zorin OS, such as 15.3 LITE.
Additionally, you could also run Bionic Pup for 32-bit CPU's, if your machine is too slow for the average Linux OS. At this point, it would probably be best to think about saving up to buy a new computer. 64-bit computers have been around since I think 2004.
I recommend a minimum of a Core I3 Intel CPU that is at least quad core. I recommend 8GB of RAM minimum. And at least an Nvidia GTX 1060 GPU.
If you can swing it, my better recommendation is a Intel Core I5 Quad or Hexa core CPU, 16GB RAM, and a RTX 2060 GPU or better.
As far as hard drive storage, you don't want to be thinking of anything less then say 256GB at this point, where as 512GB would be preferable.