How do I buy Bitcoin on eChecks?

Excuse me, as a cryptocurrency enthusiast, I'm interested in purchasing Bitcoin but I'm wondering about the specific process of using eChecks for this transaction. Could you elaborate on the steps I need to take to successfully buy Bitcoin with eChecks? I've heard it's a convenient option but I'm not entirely sure how to navigate the process. Would I need to sign up for a specific service? Are there any security measures I should be aware of? Additionally, are there any transaction limits or fees associated with using eChecks to buy Bitcoin? Your guidance would be greatly appreciated.