Improve API in GraphQL Laravel (PHP)

We write api for mobile application
Now about 60% of the API is ready, the project was on the stop for about 5 months, so the old developers are already on other projects.
You need to work on the project for the next month, so you need to be ready to devote 4-5 hours every day

Add info:
2 MSSQL databases
Test servac spins on docker compose (commands for deployment)
We use GitLab

In response, write your rate per hour and experience with laravel graphQL