Maybe you should try Rave Master. My friend got me into it and I got a friend into it. I think that it is a really good. I'll ask one of my friends tomorrow to see if she has any good options.
Full Metal Panic! is pretty good. Each volume is quite funny, but it also has serious overtones and plot arcs over the 9 volumes that make up the first series. It's very accessable, and there are 9 volumes in the first series and 4 in the second more humour focused series. I enjoyed it. As for naughty bits, it has occasional swearing and some artistic nudity, and a little fan service here and there. Nothing too bad; if you aren't sure, go to your local book store and flip through.