TLS and SSL both are the similar products and they work on the same algorithm, so there is no doubt that if you learn SSL certificate security then you will understand about TLS automatically. If you want in-depth view on SSL certificate and knowledge about SSL certificate, then would advise you go through below enlisted platforms which offers good knowledge about SSL certificate security!
SSL certificate information center -
www.symantec.com/page.jsp?id=ssl-information-center
SSL knowledge article,
www.tldp.org/HOWTO/SSL-Certificates-HOWTO/x64.html
SSL products detail research and blogs -
https://www.rapidsslonline.com/blog/