This is project is very easy; i will register a new domain and i just need you to copy my old store to the new domain, as long as installing a regular theme on the new store
The copy must include everything from the previous store (except the theme): products, categories, information,payments methods, etc. and must be working properly. The version of opencart for the new theme may be different and you may need to make some ajustments/upgrades.
This is easy for someone that understands about opencart.