It's unclear whether this is the first attempt for the OP, I was assuming they had experience before but were wondering what a higher dose was like.
If you haven't tripped before, definitely take 2 or 3 grams at maximum for your first time, 5-6 grams of good mushrooms is going to be extremely powerful, and mushrooms are one of the most chaotic/intense trips in my opinion and in the opinion of many others. Certainly make sure you have nothing to worry about (ie, your parents finding out - this may or may not apply to you but if it does, wait until a time when you don't have to worry about that). In general if you have to hide it, you should not do it, because you will NOT be able to hide that you're fucked up if you encounter people.
Have some good music in a playlist so you don't have to deal with operating a device mid-trip. Be comfortable with no responsibilities. Weed will make it a lot more intense, so only smoke if you're feeling like it's not strong enough after a couple of hours. If you're trying to calm down, it won't work, it will make it WAY worse. I only know a few people where weed calms them down if they're feeling anxious, generally it makes you more anxious and it also greatly strengthens trips.