Due to a preset minimum payment amount as of $20 or 20 euro it is only possible to buy both tutorials at once.
If you want to proceed, please, contact me at firstname.lastname@example.org to get the Payment link.
To make the payment you will need to have a valid google account. You can check the Payment Instruction for the details on how the payment page will look like and what form you will need to fill out to make the payment. Please contact me at email@example.com if you have any questions.