Agree that 1200 is much too fine. I sanded to 400 and used danish oil with no problem. I like the look of “natural” finished guitars and actually prefer a stained look.
It sounds like your in a experimental phase and it may be worth holding off and doing some research on the forum or for some examples of what stains people have used in build diaries. Otherwise if you like the natural wood look you could simply use a danish oil to build up some coats on the body, this will impart some colour and also does build up over several coats to protect your body (although not the hardest finish). It’s very easy to apply and there is a heap of tutorials on YouTube where it has been applied to DIY guitar bodies or other types of wood.
If you want to impart colour to your body, don’t get to attached to the colour on the jar/can of the stain as each wood will effect the final colour and outcome. And in this instance a wipe on poly may be a good top coat option. Again very easy to apply and lots of example or how to’s on the YouTube on guitar DIY bodies.