How to send sol to Helium Mobile?

Hello, I'm new to the world of cryptocurrency and I'm a bit confused about how to send SOL to my Helium Mobile wallet. Could you please guide me through the process step-by-step? I'm not very tech-savvy, so please explain it in simple terms. Also, are there any fees involved in sending SOL to Helium Mobile? If so, how much can I expect to pay? Additionally, is there a minimum amount of SOL that I need to send? I would really appreciate your help in understanding this process. Thank you!