Edits on the site on WordPress

Needs improvements on the site. Fix errors, consult, configure the filter in the catalog. Im waiting for suggestions. Perhaps there will be more tasks on the project.
By cost – up to 4tr. In the evening I will be able to leave a detailed tk.
One of the problems is that the main page of the site does not load the first time. Only when the page is reloaded does the content be displayed.