Holding bitcoin is not hard.

You can create a paper wallet using an airgapped device, buy an hardware wallet for or, or if you have a device you are no more using, you can make the device to be airgapped, create a wallet on the airgapped device. Most importantly, backup your seed phrase, replicate it and protect it in 2 or 3 different locations.

Bitcoin is bitcoin, but you project is just an altcoin project that would be pegged or backed by bitcoin, but that does not mean it is not an altcoin, it is actually an altcoin.

Not that it is complicated, it is not bitcoin.