I need help with making this Top bar

[trim lily]

So, I have no clue what I'm doing but i was just follow a youtube tutorial and coding at the same time, so after all that i was going to try and test it out when all of a sudden these arrors occured and nothing even showed up. Now im not so expert but it seems like I did something wrong, I would love some help from the community

[naive mountain]

** You are now Level 1! **

[hazy mesa]

Add the Player Service on the top

[fallen abyss]

Bro why you still using WaitForChild

[hazy mesa]

You use WaitForChild() for the clients not the server/

If you are using on the server. Don't use WaitForChild()

[fallen abyss]

Ok maybe