ram 32 gb

The only path for such an upgrade is to convert your current computer to CASH by selling it, and use the cash to buy a new or used computer that better meets your needs.

At this writing, only the top-of-the-line new MacBook Pro is available with 32GB installed at the factory.

All other models are incapable of addressing that much RAM, even of you invented a way to solder it in place.

That model can not be upgraded after purchase.

No. Retina computers have never had RAM that could be upgraded post computer purchase.