Let me get this straight regarding the wallet:

So I downloaded Lisk Nano and made a passphrase. I transferred my LSK to that address provided. So if anything ever goes wrong, all I need is my passphrase to recover my LSK right? So basically i can go to my friends house, use my passphrase on their Lisk Nano and my wallet would open with all my LSK correct?

So all I need to back up is the passphrase then?

So Lisk Nano is a wallet I can hold LSK for a long time in correct?

Also, does it matter what node I use? I see I have quite a few options. Thanks!