Here is some advice from someone experienced.

It would probably be a bad idea to take the whole 1/8th....Take half. Seriously.

You should take them on an empty stomach. Partly because of the possibility of nausea. Try taking them with OJ...have alot of water around too.

I wouldn't smoke weed until the come-down. Then weed helps calm you down. Coming down off shrooms can be a little depressing. Weed helps.

Setting? Your room is fine. Nature is better, but only if it is somewhere where you are comfortable and FAMILIAR with. Start in your room, and walk somewhere if you decide too. Thats my two cents. Other people may have different advice.