Hello.
Nice to meet you, I have checked your proposal very carefully.
"The app page needs to be divided into two parts. The first part needs to feature a "host game" option and the other part needs to feature a "join game" option." : yes, it is clear for me
Also your project must be divided into two parts.
1. Football game development with hosting feature
2. Implementation in your app the remaining parts with the first part.
Of course, I have many experiences in various Game development including Strategy, poker, Quiz, Casino, and etc.
I hope I will be selected by you.
Good luck!