As long as you're not doing anything crazy with it, it will be pretty tame. When it's idle it takes up virtually no resources and as long as you manage your indexes correctly (e.g. HAVE indexes ) it shouldn't eat up too much CPU.
Also, if you're looking for help on newsgroups look at comp.databases.sybase. Also load a new server into your newsgroup viewer of "forums.sybase.com" and you can sign up to the sybase.public.* newsgroups (ASE is 'sqlserver').
I think you can purchase the books as a hard-copy if you want; although I think they're great online (especially with the ability to search) so I wouldn't buy them.
For a hard-copy of advanced T-SQL (albeit MS SQL Server specific) I'd reccomend:
"Inside Microsoft SQL Server 7.0" (Microsoft Press; Soukup & Delaney):
I'm sure Inside MS SQL 2000 would be great as well, although 7.0 T-SQL is closer to Sybase's T-SQL since SQL Server 2000 has a bunch of new things like OLAP and such.
Two other general DB books that I like are:
"Database Systems: A Practical Approach to Design, Implementation, and Management" (Connolly & Begg):
"Database Systems: Design, Implementation, and Management" (Rob & Coronel):