I've never really been a fan of portastudios ever since i got into mixing in the box.
Theres much more flexibility in my opinion in mixing in the box (the computer that is monica

) because its a much more comprehensible environment as it utilises graphics in conjunction with music...which humans love! Visual editing!
Portastudios i mean, are great if you just want to quickly lay down tracks, and can play perfectly in time, in pitch, etc... Because editing on those things is to say the least, far from user friendly IMHO. Plus you have to lob around the mic leads, stands, mics, amps, anyway if you plan on becoming mobile.
I think, monica you should explore the internet like tim said. Theres loads of stuff out there on this. Check out Tweaks site, its a great place to learn the basics (and some indepth knowledge) on home music production; such as gear reviews, what gear you need, analog and digital, etc... Its simply the beginners bible.
Tweaks Guide
I think to keep with the times look into computer recording, i think the quality available with using a computer for recording is amazing for the price you pay.
And theres more options available too.
But read up all of what you can on that site first, it will give you a huge insight into what you really need.
Stylistically, i think you can get away with recording any style in any format you want, as long as you know what you can achieve with whatever system you choose to use
