Let me try to give you some answers to your questions:
What is the best way to keep track of deals that are sold and become customers.
Deals that become 'closed won' in HubSpot Sales automatically move associated contacts and companies to the 'Customer' lifecycle stage. You can create lists or build reports (with the add-on) to look at these
I want to track customer service, technical support of current customers, etc.
That's not really supported by HubSpot at present but they have announced the introduction of a customer support product (Customer Hub) in 2018
What do I do to turn a deal (sale) into a customer?
You need to move the deal to a deal stage with a condition of closed won, i.e. 100% probability
I want a list of current customers that I can update info for.
Create a list of contacts or companies with lifecycle stage equal to customer - assuming you have them correctly associated to deals at the closed won stage
I want this list to be seperate from my Deals.
Lists are totally seperate from the deals tool and can focus on just the contact or compay object
Let me try to give you some answers to your questions:
What is the best way to keep track of deals that are sold and become customers.
Deals that become 'closed won' in HubSpot Sales automatically move associated contacts and companies to the 'Customer' lifecycle stage. You can create lists or build reports (with the add-on) to look at these
I want to track customer service, technical support of current customers, etc.
That's not really supported by HubSpot at present but they have announced the introduction of a customer support product (Customer Hub) in 2018
What do I do to turn a deal (sale) into a customer?
You need to move the deal to a deal stage with a condition of closed won, i.e. 100% probability
I want a list of current customers that I can update info for.
Create a list of contacts or companies with lifecycle stage equal to customer - assuming you have them correctly associated to deals at the closed won stage
I want this list to be seperate from my Deals.
Lists are totally seperate from the deals tool and can focus on just the contact or compay object