Buying my first boxster

[kk2002s]

I think you need to drive it for awhile
Check the levels all the time. Look for drips. Smell the smells after you drive it.
Change the oil yourself, cut the filter open, drop the pan and inspect what all that looks like
You don't sound like you are set up to do repairs easily, no garage, jacks, stands, specific tools or the ability to let the car sit while you figure out what is wrong and fix it yourself
You could do all those preventatives, that will certainly take them out of the equation, but there are many other things that can take out that engine that you can't really prevent easily.
It's a slippery slope
Hey if you have the funds, go for it
You won't know until you drive it and they present themselves

Drive the thing, they love it, you'll love it and you'll start to get a feel for what is needed right away
Oh by the way - Congrats - and welcome