NameBright

Hello all, 

This is the first time I've ever gone about buying a domain and setting up a website, so forgive me if this is a novice question:

I bought my domain on NameBright, and unfortunately, I can't transfer the domain since I'm on a payment plan. That said, I updated all the DNS records on NameBright per the step-by-step instructions on SP. I'm waiting for my SSL certificate to process and keep getting an error like the one listed below. I'm wondering if I did this correctly based on the NameBright screenshot below (e.g., do I need to delete the TXT record)? Also, do I need to change the NameServer on NameBright or do I leave that as is (third screenshot below)? I didn't see anything related to that in the instructions. 

Thank you!