all of these are good starting points. Ultimately you need to map this out and ensure your privacy/legal team sign off otherwise you are putting yourself at risk.
Other than the docs, it's a good idea to decide on the process for your firm. There are several threads here, and on my site, on what to consider and how to build out automation to...
Go into Lead Fields and Contact Fields:Lead.Lead Status >> Map to Contact StatusContact.Contact Status >> at what Status do you want to Convert the Lead as?