I'd recommend starting with some of hte articles in the "stairways" series, here on SQL Server Central:
http://www.sqlservercentral.com/stairway/
those articles are on subjects and build up from basic information to more and more features about that subject;
this one, designed for starting out on TSQL, would be the first i'd recommend:
http://www.sqlservercentral.com/stairway/75773/
Lowell