read everything. look at man pages, and sun docs, etc.
note that finding a sys admin position is tough. lots of competition and especially for someone who is just getting into the arena. take myself as an example. 25 years old with roughly 3 solid years of industry experience. not as an admin however, roughly 1 year experience as admin. now, try selling yourself to an employer who is looking for an admin with 6-8 years experience with SAN, veritas, clustering and tuning expert experience. its not fun for us starting our careers. employers are hell bent on having their cake and eating it to. you just have to be extremely familiar with the workings of solaris itself. unfortunately you won't be very familiar with some of the other skills. you just have to prove you are hungry to learn and eager to stay until 12am to make things happen. but the god honest reality of it is you must know everything about solaris. as an operator, you are atleast partly there. you must know some basic commands, how to run scripts and maybe even how to write them. always good stuff. talk with admins at your company. see what they are doing and how to get involved if you can. always be curious about what they are doing.
now the fun part:
if you actually get the interview, prepare to be attacked (yes, attacked) with questions that you've never heard of or seen. i've heard everything from how do you find the number of cpus in a system (easy) to write me a script in php that connects to a database (what the hell?!). again, everything from simple to what the hell kinda question is that on an interview?! a lot of people will disagree with me but this industry is all about flexing your knowledge to someone else. i see it everyday at my company. just realize people will throw you some crazy questions. be calm, be straight with them and answer what you know or a possible answer that might be in the ball park. at our stage in the game, we need to prove we are long term commitments willing to do what it takes to sell the product.
ok my preaching is over... hahahah