GotG was awesome but don't start there.

Start with Annihilation. Then read Annihilation: Conquest. THEN read Guardians of the Galaxy (along with Nova).

Uncanny X-Men 475-486: Rise and Fall of the Shi'ar Empire

Follows Havok, Rachel Summers, Polaris, Warpath ,Starjammers etc. Fighting Vulcan.

Fun Story available in Trade.

I started reading comics about 3 years ago. Its really easy to get started reading comics now since alot of Marvel and all the DC comics reset to issue #1 recently. I also subscibed to Marvel Comics Unlimited Online to read the really old back issues of comics online. If you get the unlimited I think that is the best place to start there is literally thousands of comics on there for a yearly membership fee I think it was $60 but if you look online there are tons of discount codes you can apply I think i wound up paying like $40 bux for the whole year sooooo worth it.