How long should I leave the butt plug in for

you can use a candlle, its easy to shape, and you can get every size you want; also you can make many interesting butt plugs with pet toys.

If you get enough sticky tape, you could fashion that into one I guess by wrapping it around a pen or something. Maybe wrap the whole thing in duct tape afterwards so that the sharp edges of tape don't cut you or hurt you

Just use an apple. normally it wouldn't fit unless you're very experienced but you can shape it. Just bite around it like you normally would, leaving a u shaped channel running horizontally around the apple. the bottom will be narrow enough that you can slip it in, but you'll want to round off the edge you've just left (use a spoon or a carrot peeler) so it's smooth. The channel you've made will make a nice spot for your anus to hang on to, and the very wide top of the apple will create an excellent stopper so that it doesn't go in all the way. And all it took was a trip to the grocery store.

You can use a wine opener just like this one

https://d3mov4ud3s7ua9.cloudfront.ne..._3342-zoom.jpg

and put a cucumber or a carrot on it but be careful not to break or disconnect