http://sparrowa7io5pz6ud3ehqzosvepbxbxt2zphmkjsylp2zgxooko23pqd.onion/docs/best-practices.html
With respect to wallet type, if you are not using a Multi Signature (multisig) wallet at this stage, you should be educating yourself on the benefits.
Multisig wallets require more investment in time and resource, requiring you to purchase multiple hardware wallets and ensure they (and their backups) are stored safely and ideally in different locations.