You can amend this guide to achieve your desired result - instead of creating a partition for /boot - you create a 30G partition for root - and a partition for your home - mounted at /home - then tick the encryptionbox for your home partition.
You can amend this guide to achieve your desired result - instead of creating a partition for /boot - you create a 30G partition for root - and a partition for your home - mounted at /home - then tick the encryptionbox for your home partition.