Hey there
sarah noor welcome to BYC and congratulations on becoming a new chicken parent .. your little ones look adorable.
If I can please, just a couple of things that come to mind:
1. I have one of those little coops as a hospital pen and/or broody pen when I have run out of room in the coop. They are very handy. However, as mentioned, your little ones are going to outgrow it in a few weeks. Also, when they want to start roosting, if it is the same as mine, there is nowhere to put a roost for them except maybe between the bars on the outside part. Having said that, for what you are doing now, it is ideal.
2. I do not know where you are located, but if I see the picture clearly, while you have covered one section for shade I assume, one part is open. Here, the food would attract Crows who would have no problem accessing your run and with the problems I am currently having with Crows, I would not trust them with little chicks and they may attack them.
That is a great little set up for now and I am guessing you have something else in mind for when they get bigger.
BYC is overloaded with wonderful/helpful people so please feel free to ask questions and also visit the Learning Centre where there are probably also many answers to questions you may have.
https://www.backyardchickens.com/atype/1/Learning_Center
Once again, welcome and good luck with your little ones … they are so much fun but word of warning, very addictive