Can I study Assalamu ‘Alaykum textbooks by myself, and then get a certificate from YIAL?

Yes,  students can do.  Interested students are required to register at www.asaktextbook.com,  inform us at info@yialarabic.com, pay the test fees (including post fees) through PayPal at payments@yialarabic.com  , and set up the exam time with YIAL administration.  After YIAL administration approves applications,  one of YIAL teachers will be appointed to supervise the exam online, and the applicant will be able to  access the specified exam for 2  hours (the exam time).  After the submission of the answers and within 2-4 days, YIAL issues completion certificate  only to successful candidates , emails them colored copies, and post them the original papers.