i can train you an architecture of Sql server, installation and upgrading,backup and recovery,server level configurations, dbcc, server and db level security, working with locking, blocking issues, working with concurrency problems, using profiler and extended events, query tuning, sp tuning, HA(LOG SHIPPING, DATABASE MIRRORING, REPLICATION, CLUSTERING, ALWAYS ON).. managing agent jobs, working on health checks and maintainence plans, db migrations..