You can use the Workshop to produce blueprints and convert blueprints into another vehicle's blueprints.
In order to produce blueprints, an available Workshop Slot is required. At higher ranks more slots become available. VIP Players have extra slots, depending on their VIP level.
With enough slots, you can have multiple production jobs running at the same time.
Blueprint production is enabled for vehicles available to your rank. Production of VIP vehicles' blueprints is only available to players with an active VIP Subscription.
You can convert blueprints to another vehicle's blueprints in the Workshop as well. As tier differences between vehicles increase, fewer blueprints are obtained as a result of the conversion process.
As the vehicle tier increases, the conversion process takes longer.
Blueprint conversion is enabled for vehicles available to your rank. Conversion to VIP vehicles' blueprints is only available to players with an active VIP Subscription.
[How to Craft Blueprints]
[How to Conver Blueprints]