I don't know how to explain it exactly, but don't
try to be more relaxed. Just be. I know that sounds hard, I've had anxiety issues before, and you don't want to stress out about trying to not stressing out. Do the things you think are fun. I also understand being self conscience, I have those issues all the time. The thing to remember about weed is that it isn't alcohol, it isn't meth, or heroin, or crack... it's weed. Everyone there that smoked some weed is almost certainly happy, considering they just ingested a powerful chemical that
makes you happy. People are going to be playful and funny or anything else chill... So, instead of over thinking, don't think. Cause it will be fine, you're high
Another thing about being self-conscience. Try to think about it like this way; If you're worried that if you do something bad people will judge you negatively, then the inverse must be true. If you do something good, people will judge you positively. Well, when people are stoned, they think everything is good, even bad movies and other stupid things, I've seen plenty of stoners watch soap opera's in the morning cause they're hilarious when stoned. I wonder how many stoners I have seen glued to The Price is Right (a fuckton and a half). Everything is AWESOME. Including you, obviously. So just remember that no matter what happens, no matter what interactions you have, no matter what you do, or say, people are going to react positively. This is kinda why I love smoking. It's such a good way to socialize and meet new people, in pretty much any setting. I was at a concert not long ago and I had no weed. I saw some kids with a bunch and I jokingly asked them if I could hit that. They were so happy to hook me, they all wanted me to try their type of weed. So I got greens of like 4-5 bowls. I've been chillin in the woods smoking weed and have had older folks come up and ask if they can smoke. I was at a baseball game, smoking weed with a vaporizer, and a grandma behind was amazed and we explained it all to her and then she smoked a pretty large amount, it was so funny

. When you're smoking no one makes you feel unwanted, ever. Everyone's happy, and if they're not, the stoned people (is that a good name for a band %)) try to make them happy. It's something people love to do when their stoned, make unhappy people happy. It's fun, it's like a game. I mean, most people who have recently smoked weed are absurdly nice.
So if you do anything that you feel like doing, people will dig it, start singing your favorite song! Start dancing! Chances are people will follow your lead! So there is really no reason to
try to be relaxed cause smoking is known to be awesome and if it's a given that it will be awesome, your default mode will be relaxed. You know what you're about to do is awesome for certain, so you don't think about it, therefor you have to be relaxed. This is actually a good way to think about a lot of things. It's helped me out to blossom socially. Most social situations you'll be involved in are almost always awesome.
It just hard to remember this when you're stoned.