Learning ERA5 Data Downloading

Hello!
I hope everybody is doing great. Currently I am working on the ERA5 but facing problems working with API data downloading systems. I will be grateful to you if guide me about it. I followed steps given on website but still facing client issue while running the code in python environment.
I’ll be open to discuss this as per your recommendations and guide. I even appreciate if any of you help me via zoom meeting or any specific guide.
Kind Regards.