Hi Blue.
You say "home recording studio" but what exactly do you want to do?
Record just yourself singing and an instrument? What can you play? Or do you have a few mates and want to get together and record several instruments and voices at the same time?
Do you know what MIDI is? If not find out. If you do and intend to use it then go for Cubase (or an AI that gives you a starter pack of it).
If however you have a Grand Plan. A nice big space that you can split for recording and
control room and you intend to build a semi-pro, maybe even a commercial
studio one day, stop and think VERY hard but follow what might seem at first a paradoxical idea and a waste of money. .....
Assuming you are a total beginner, buy a modest Audio Interface for equive £100 and there is none better than
the Steinberg UR22. Also buy a cheap small "pencil" style capacitor (aka condenser) microphone and cable. This outlay will give you an interface, which can take the mic or a guitar or any other instrument you might have. It also gets you Cubase and the whole shooting match should work fine on whatever computer you are now using unless it is very, very old. If the PC has XP on it you should be fine.
Now, you can try some recording and get stuck in learning Cubase. This is quite a learning curve but if you master it you can consider buying gear with more connections and power and also a more powerful PC. If you cannot get to grips with Cubase do not flail about seeking "simpler" software. Anything worthwhile is going to be just as complex and hard to learn.
Dave.