Ya, for your first time I'd actually do it in a comfortable place and make sure your in a good state of mind. I actually had a TERRIBLEY BAD TRIP my first time. I thought I was from three seconds in the future because God was telling me what was going to happen. I tripped pretty hard. I wasn't really in that good of a state of mind though. I was with my girlfriend whom there were terrible relationship problems starting to occur and everything about the place I was in had a terrible visual overstimulus. The walls were psychodelic paint squares and with black lights covering the entire room. Way too much going on. I've enjoyed it very much since then, but I'd experiment with it before really going out on a limb and experimenting with it. I've had great visualizations from indoors
Just get real comfortable in a chair or something. It doesnt really mes you up. You get a crazy effect for a good 30seconds - MAYBE 1minute. I dont care for the stuff as I can only feel it for about 10seconds before its gone then I just get a headache in the end.