I am new here and don't have files or lists of customers, but will be creating a list of contacts as I go. I want to use HubSpot, but need an "Old School" way to populate my contacts
That said, one-off contact creation can get super time-consuming. If you're going to be individually reviewing contacts and entering their information anyway, you may be better off building a contact spreadsheet that you can import all at once. Here is the HubSpot Knowledge Base article on setting up an import file.
You basically just want a column for each property (i.e., first name, last name, email address, phone number, company name, contact owner) and then a row for each individual contact containing the values for each column.