The Key on Opencart 3

Website under the key:
1 . Installation and configuration of the system.
The 2nd Creating a theme based on design.
3 . Writing functional: filter, page of order, goods in other colors, etc. The site is created on a pure open card, all the non-default functional is written under the site.
and 4. Optimize the system speed.
and 5. The exchange of goods with a third party.