Thanks everyone for the reply.

It looks like I have no choice but to use Hardware Wallet since using Raspberry Pi is a bit tedious work especially if you still do not have any idea on how Raspberry Pi works though I always hear it.

I also do not have an extra old laptop that I can use as an alternative airgapped wallet. Anyways, thank you for giving some alternative ways in setting up a hardware wallet. I'll keep these in mind.

Thank you!