My website takes too long to load the first time

Translated to English

Hello, wanting to enter my website for the first time from any device takes too long to load, then they already stay at a decent speed, that happens every day. After a few hours of not entering the web it takes too long to load. I would appreciate very much if you could help me solve this problem, thank you very much.

Welcome, please post in English.
Since you are using a custom domain, you may want to use CloudFlare.
Follow this guide.

Using cron job may help as well