If you are a beginner you can try with
Kiss Blue
Utsumuku Shisen
Koisuru Boukun

Oh, You definitely have to read these mangas first!

• All Kunieda Saika's woks
• Let Dai by Sooyeon Won
• Gerard and Jacques by Yoshinaga Fumi

my first yaoi is actually quite hardcore.. 😀 dang, i still remember that day.. i literally went.. O__O "what the fuck!?" i have no idea that this genre actually exist and im quite still young at that time.. anyways i suggest you shoudn't stay away for the hard ones.. some of them are so darn good you can forgive the smex. 😃

well I think good starters would be...
(from whats already mentioned)
Sorenari ni Shinken nandesu - really sweet and not too graphic
seven days - one of my favs
totally captivated - my alltime favourite XD

and some others that are worth a try
Café Latte Rhapsody - really sweet
Hatsuai
Yatteraneeze! - the cover is not that great but he art will get really beautifull!!! don't let the cover scare you XD
Yume Musubi, Koi Musubi
super lovers - really cute

IMO they all have a decent story, are not to graphic and are not one of the thousent out there that you will forgett 5 minutes after reading them XD

you should read only the ring finger knows is very light and good!